* 6-12 Speed Chain Whip & Fixed Gear Lockring Wrench* Innovative chain retention hook locks tool onto cassette, ensuring full chain wrap and eliminating slippage.* Tool geometry offers maximum effective leverage and compact 270mm length.* Compatible with all multi-gear cassettes including 12-Speed. Chain retention hook fits cogs up to 18 teeth.* Integrated fixed gear lockring wrench optimized for 41-42mm OD lockrings.