CHAIN WHIP PEDROS PRO II YL/BKInnovative chain retention hook locks tool onto cassette, ensuring full chain wrap and eliminating slippage Features a 3 8` square drive for use with torque wrenches, ergonomic TPR rubber grip, and increased handle thickness Compatible with all multi gear cassettes including 13 Speed. Chain retention hook fits cogs up to 18 teeth Tool geometry offers maximum effective leverage and compact 290mm length Integrated fixed gear lockring wrench optimized