5 Pcs MK7 Extruder hobbed Drive Gear Pulley 5mm Shaft - 3D Printer part

This says it is for a MK8 extruder and , yes, it does physically but the hobbed portion is for 2.85mm filament, not 1.75mm. It looks to be of acceptable quality though a second grub screw would improve security on the stepper shaft. Build is not the quality of hobs like the E3D ones but reasonably well machined though with not much depth to the teeth but it is useless for me as it does not grip the filament even slightly.