The new QR Extension2from Predator pairs with any Predator Cue equipped with the Uni-Loc®Weight Cartridge System. Once installed the quick releasing extension adds an additional 8 inches (20.32cm) of butt length with a single turn of the extension handle. Simply remove your existing rubber bumper, install the Uni-Loc®QR Extension2bumper using a standard 6mm allen wrench, twist on the QR Extension2handle and you’re ready to go.