Adjustable Clamp 9170 Pony Rapid Acting Miter Clamp

This thing is designed so that you push a little block to separate the screw from a catch which engages the threads when tightening. Trouble is one of the catches doesn't stay engaged; as soon as the screw gets the least bit tight, it slips off the catch and just spins. The whole thing is useless. Poor design, poor assembly.

The Pony 9170 clamp is intended for right-angle use. I use mine to hold rails and stiles together for attachment. The clamp has a good length of screw enabling the clamping of wide items (2+ inches -- see specs.).Now the bad news. Because the clamp designer wanted a clamp that would quickly adjust, rather than requiring the screw to be turned from large to small opening, a "push button" was installed. Push the button, and the threaded "nut" is removed from the screw, enabling rapid adjustment. Great idea, but poorly executed. The mechanism is a single small piece of casting that engages the screw thread over, perhaps, 20-30 degrees of rotation around the thread. This is insufficient for moderate to high pressures. Thus, the clamp screw tends to slip from a tight clamp to a looser one. This can be somewhat controlled by putting the proper orientation of side torque on the handle, which holds the screw into the portion of the nut that is present.Bottom line, good concept, poor design. I'm keeping mine, and using them, but they are less than excellent.

I am using these clamps to help glue and staple the 1 x 6 rabbited hemlock trim around the windows in the unfinished portion of my home. I innitially worked with bar clamps combined with blocks to square the corners and that required at least 3 clamps per corner. These clamps are much easier to use and securly hold the trim at right angles. They are also nicely finished, easy to adjust and built heafty enough to frame larger than picture frame material. The price at Amazon was a bargain.

I have used several miter clamps, and I found this one to be quite accurate and easy to set up. Also it seems to be rather durable. Many of the other clamps of this nature seem to easily break or the screw mechanism pulls out of square. I felt the price was very reasonable. It makes picture framing a snap. Thanks Pony and Amazon.

Very disappointing product. I would not buy these again. These clamps are very cheaply made and not parallel at all. They would have to be machined first to get accurate results. I had them for a while before I used them the first time and was very dissatisfied. Should have tried them out earlier and returned them

I typically have purchased these from Sears in the past. I purchased these from Amazon. Saved time and money and these seem to be a more sturdy product.

I have used these on a few large projects and have been very happy with their performance. Makes life a lot easier while waiting for glue to set up. Will probably order more if I take on more framing work.

The 'screw type' closing mechanism does not work well as the screw slips when you tighted the clamp. It does form a nice 90 degree angle if the clamp does not slip - I bought 2 clamps and only one 1 of the 4 screw tighteners actually works. I might be able to fix this by modifying the whole the screw tightener uses, but I shouldn't have to fix the poor design of this product. I will use another manufacturer next time.