TenPoint Crossbow Technologies TRX/TX Series Stock Extension Black. It installs easily and can be removed just as quickly if the added length is no longer needed. The kit includes one stock extension and one screw. Specifications for TenPoint Crossbow Technologies TRX/TX Series Stock Extension: Manufacturer: TenPoint Crossbow Technologies Color: Black Package Contents: TenPoint Crossbow Technologies TRX/TX Series Stock Extension TenPoint Crossbow Technologies HCA-483: TRX/TX Series Stock Extension Black