Works for 180 degree AMP 110 Series 8 Position Jacks with Dust Cover Only. Includes CAT5, CAT6 and CAT6a (Shielded) UTP jacks. Simply seat all 8 wires into the 180-degree punch down type keystone jack then put the jack into the tool. One-handed operation allows you to punch down and trim all 4 pairs of your Ethernet cable into a 180 Degree keystone jack with just one crimp. It will save you time and money by easily punch down all wires at the same time with a quick squeeze of the tool. Ergonomically designed handle, easy to use, seats and cuts all wires at the same time while reduces hand fatigue. This tool will even cut off the excess wire, leaving you with a perfect keystone jack every time.