The Mini QR Extension2 from Predator pairs with any Predator Cue equipped with the Uni-Loc Weight Cartridge System, as well as with Poison Cues.Once installed the quick releasing extension adds an additional 3 inches (7.62cm) of butt length with a single turn of the extension handle. Simply remove your existing rubber bumper, install the Uni-Loc QR Extension2 bumper using a standard 6mm allen wrench, twist on the QR Extension2 handle and you’re ready to go.Note: the extension is shipped with the extension bumper screwed on.Compatible with all Predator, Poison, and Molinari cues made since 2012, including:Sneaky Pete SP4, SP6 and SP8 Series8K and 9K Series CuesBK3 and BK-Rush Break CuesBlak 2nd, 3rd and 4th Generation Series CuesIkon 2nd, 3rd and 4th Generation Series CuesThrone 1st and 2nd Generation Series CuesP3 Series CuesSport II Series CuesLimited and Special Editions (2012 and newer)Predator CRM and Molinari by Predator Carom CuesSpecifications:QR Bumper weight: 0.4 oz (11 gr)QR Extension Handle Weight: 2.1 oz (60 gr)QR Extension Handle Length: 3″ (7.62 cm)Finish: Black High-Gloss