Derby Monkey Axle Lock Set Screw Kit is perfect for locking axles and protecting your Pinewood Derby car's alignment. This is the system that many professional builders use instead of placing a drop of glue on the axles.
You can easily spend several hours trying to align your car for its optimum speed. When you get it where you want it you should lock it in. Simply drill a #44 hole underneath the body directly under each axle. Insert the set screws. Align the car. Tighten the screws. Your alignment is now locked in place.
The kit includes six 4/40 x 1/8″ set screws (black), one Hex (Allen) Key and instructions.