Park Tool BT-2 Cable Stretcher. Commonly referred to as a 4th Hand the Park Tool Cable Stretcher pulls cables tight for adjustment of derailleurs and brakes. It features one-hand operation with a thumb lock to hold the cable tight while your hand is freed up to tighten bolts and nuts. A must-have for any shop home or professional.

• One-hand operation with thumb lock
• Made from chrome plated heat treated steel
• Cushion grips for comfort