Park Tool BT-2 4th Hand Brake with Locking Ratchet
Commonly referred to as a “4th Handâ€, 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 pull-up bolts and nuts. A must for any shop, home or professional.