Bike Disk Brake screw alignment tool - Keep from stripping or cross threading screws on your disk brakes
Procedure: Lay disc on mounting surface. Hand start all screws by hand. (screws are pre-Loctited) Put puck on axle and use QR to hold in place. Insert wrench and square up with screw. Hold puck to stabilize wrench. Spin wrench freely, it will not rock out of engagement with screw head.