---
product_id: 14644994
title: "Doc Johnson Vac-U-Lock Accessories - Knuckle Up - Improves Control Of Slippery Dildos - Great For Pegging and Pounding Your Partner"
brand: "doc johnson"
price: "€ 51.31"
currency: EUR
in_stock: true
reviews_count: 13
category: "Doc Johnson"
url: https://www.desertcart.be/products/14644994-doc-johnson-vac-u-lock-accessories-knuckle-up-improves-control
store_origin: BE
region: Belgium
---

# Brass knuckles shape for grip Compatible with all Vac-U-Lock toys 6 in. ergonomic length Doc Johnson Vac-U-Lock Accessories - Knuckle Up - Improves Control Of Slippery Dildos - Great For Pegging and Pounding Your Partner

**Brand:** doc johnson
**Price:** € 51.31
**Availability:** ✅ In Stock

## Summary

> ✊ Take control and never miss a beat with Knuckle Up!

## Quick Answers

- **What is this?** Doc Johnson Vac-U-Lock Accessories - Knuckle Up - Improves Control Of Slippery Dildos - Great For Pegging and Pounding Your Partner by doc johnson
- **How much does it cost?** € 51.31 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/14644994-doc-johnson-vac-u-lock-accessories-knuckle-up-improves-control)

## Best For

- doc johnson enthusiasts

## Why This Product

- Trusted doc johnson brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable & Discreet:** Lightweight yet sturdy, designed for confident, comfortable handling.
- • **Ergonomic 6-inch Length:** Perfectly sized for handheld control and precision.
- • **Elevate Your Play Options:** Transforms strap-on use into direct, hands-on control for dynamic experiences.
- • **Distinctive Brass Knuckles Design:** Ensures a powerful, non-slip grip even during intense play.
- • **Universal Vac-U-Lock Compatibility:** Seamlessly fits any Vac-U-Lock attachment for versatile use.

## Overview

The Doc Johnson Vac-U-Lock Knuckle Up is a 6-inch brass knuckles-shaped grip accessory designed to enhance control over Vac-U-Lock compatible dildos. It offers a secure, non-slip hold that transforms traditional strap-on play into a more direct and versatile experience, perfect for users seeking precision and new stimulation options.

## Description

Doc Johnson Vac-U-Lock Accessories - Knuckle Up - Improves Control Of Slippery Dildos - Great For Pegging and Pounding Your Partner

Review: Opens Up Lots of New Options, Recommended!! - I received this yesterday and am pleased with what I have seen so far. This is basically a hand grip for using the Doc Johnson Vac-U-Lock line of strap on dildos. If you are not familiar with this line of dildos, I recommend doing some research. They have been around for many years (15 or so if not longer) and are very well regarded and easy to use. The Knuckle Up gives you a new option for play with the Vac-U-Lock dildos. There is a nice selection of dildos available from a 6" average unit to one that measures over a foot long and has girth that only the boldest players will be able to enjoy and appreciate. The 6" and 7" models are pretty common and average sizes. Both would be easily used with the Knuckle Up. Moving to an 8" will give you a bit more of a work-out. The 8" is longer and heavier and changes the balance/weight distribution a good bit. Still effective but more challenging for rigorous play. If you move up to the monster ("Hung") model, it's going to be a lot more of a workout. The weight will be mostly at the end of the dildo and unless you use a second hand, support and guidance will be a challenge. You might feel that way with something as small as the 8" depending on the play involved. The best thing about this is it's a nice option from having to use your Vac-U-Lock dildos ONLY as strap on devices. The Knuckle Up gives you more direct control and coordination as well as different options for additional stimulation with your other hand. For the price it is a nice addition to the toy chest. If you're just getting into the system, you can certainly take your time and enjoy the belts (they make several different models) before adding this. Or, maybe you can decide to start with this instead. Strap on systems have certainly become much more accepted in sex play in recent years, especially among female only lovers. But there is a huge advance in acceptability among the heterosexual community and more couples are exploring different options. The Knuckle Up is a nice way to add a different option to all of the above play. We have now ordered a second one as one of our friends fell in love with the original and we gave it to her as a gift. So much fun and so much more flexible than just holding a dildo or trying to wear a strapon. But it now!!
Review: awful suction cup - Garbage. The lock ring for the swivel base doesn't screw down tight enough to hold it secure. The suction cup is worthless. Will not attach to anything securely and it just falls off. On top of it you can't return this because it's a personal product. What a waste of money.

## Features

- NO
- Imported
- Approximate Product Dimensions: Vac-U-Lock - Knuckle Up; Total Length: 6 in. (15.2 cm), Width/Diameter: 1 in. (2.5 cm)
- For Easy Handheld Use of Vac-U-Lock Attachments
- Distinctive Brass Knuckles Shape
- Powerful Non-Slip Grip
- Use with Any Vac-U-Lock Compatible Attachment

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B007Q3MMS2 |
| Best Sellers Rank | #109 in Sexual Enhancers |
| Customer Reviews | 3.6 3.6 out of 5 stars (543) |
| Date First Available  | March 19, 2012 |
| Is Discontinued By Manufacturer  | No |
| Item model number  | 1010-12-AM |
| Language  | English |
| Manufacturer  | Doc Johnson |
| Product Dimensions  | 5.8 x 4.5 x 5.8 inches; 1.6 ounces |

## Product Details

- **Brand:** Doc Johnson
- **Color:** Knuckle Up
- **Item dimensions L x W x H:** 5.8 x 4.5 x 5.8 inches
- **Material:** Brass
- **Style:** Knuckle Up

## Images

![Doc Johnson Vac-U-Lock Accessories - Knuckle Up - Improves Control Of Slippery Dildos - Great For Pegging and Pounding Your Partner - Image 1](https://m.media-amazon.com/images/I/51770CDFBZL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Opens Up Lots of New Options, Recommended!!
*by D***S on August 26, 2016*

I received this yesterday and am pleased with what I have seen so far. This is basically a hand grip for using the Doc Johnson Vac-U-Lock line of strap on dildos. If you are not familiar with this line of dildos, I recommend doing some research. They have been around for many years (15 or so if not longer) and are very well regarded and easy to use. The Knuckle Up gives you a new option for play with the Vac-U-Lock dildos. There is a nice selection of dildos available from a 6" average unit to one that measures over a foot long and has girth that only the boldest players will be able to enjoy and appreciate. The 6" and 7" models are pretty common and average sizes. Both would be easily used with the Knuckle Up. Moving to an 8" will give you a bit more of a work-out. The 8" is longer and heavier and changes the balance/weight distribution a good bit. Still effective but more challenging for rigorous play. If you move up to the monster ("Hung") model, it's going to be a lot more of a workout. The weight will be mostly at the end of the dildo and unless you use a second hand, support and guidance will be a challenge. You might feel that way with something as small as the 8" depending on the play involved. The best thing about this is it's a nice option from having to use your Vac-U-Lock dildos ONLY as strap on devices. The Knuckle Up gives you more direct control and coordination as well as different options for additional stimulation with your other hand. For the price it is a nice addition to the toy chest. If you're just getting into the system, you can certainly take your time and enjoy the belts (they make several different models) before adding this. Or, maybe you can decide to start with this instead. Strap on systems have certainly become much more accepted in sex play in recent years, especially among female only lovers. But there is a huge advance in acceptability among the heterosexual community and more couples are exploring different options. The Knuckle Up is a nice way to add a different option to all of the above play. We have now ordered a second one as one of our friends fell in love with the original and we gave it to her as a gift. So much fun and so much more flexible than just holding a dildo or trying to wear a strapon. But it now!!

### ⭐ awful suction cup
*by M***E on March 20, 2026*

Garbage. The lock ring for the swivel base doesn't screw down tight enough to hold it secure. The suction cup is worthless. Will not attach to anything securely and it just falls off. On top of it you can't return this because it's a personal product. What a waste of money.

### ⭐⭐⭐⭐⭐ Good product
*by B***L on April 22, 2021*

Good Value, This product would improve with smooth rounded edges for finger placement and maybe a rubberized tail grip that is a bit springy but still resistant to lube deterioration. Otherwise price point works as intended.

## Frequently Bought Together

- Vac-U-Lock Knuckle Up - Black - Handheld Brass Knuckles-Style Grip for Vac-U-Lock Attachments, Non-Slip Grip, Body-Safe - by Doc Johnson
- Doc Johnson Vac-U-Lock Platinum Luxe Harness with Plug – Black, Adjustable Unisex Comfort-Fit, O-Ring Compatible, Neoprene Design - Strap On Harness - for Adults Only
- Vac-U-Lock CodeBlack 8 Inch Classic Dong - Black - Textured Veins, FIRMSKYN Material, Harness Compatible, Body-Safe - by Doc Johnson

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---

*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-05-09*