100HP1632A Turntable Tonearm Clamp,for AT-LP120 Turntables Audio Technica Turntable Lock.
When installing the turntable lock clip,the riser the clip is attached to has a tiny screw that you have to remove (don't lose it!)To carefully turn that riser/arm thingy 90° (slowly rotate,do not grab fragile parts.)
Before tightening the screws,lift your tension arm so that you do not damage your needle during the process,and ensure that your voice arm can be safely placed in its concave bracket and slowly tighten the screws.
Pay Attention:Suggestion it is to use T2 Phillips or 1/16 flat head for installation.