ITEM NAME:10Pcs Micro Roller Lever Arm Open Close Limit Switch KW12-3 PCB Microswitch gau 10Pcs Micro Roller Lever Arm Open Close Limit Switch KW12-3 PCB Microswitch gau a.imagelink a:hover.imagelink {color:#5a5959;.With Roller Lever Limit. 10 x Micro roller switches. The action reaches a critical point reed, instantaneous reverse action. Producing reed instantaneous action when action shifted to the critical point.