Forget fumbling with tiny bolts and screwdrivers. TurnLOCK™ makes changing guide bushings and installing router attachments a simple matter of a 1/4 twist. Just align the TurnLOCK bushing inside the TurnLOCK base, and twist. The cogs on the outside of the bushing slip into the slots on the inside of the base, locking the bushing in place. TurnLOCK base plate is made from clear resin that greatly increases the user's visibility of the work area, and allows for a more consistent alignment of router bits with any template shape.