The Halfords Advanced Cassette Tool enables precise removal and installation of bike cassettes and centre lock disc brake lockrings. Compatible with Shimano, SRAM, and most 7–12 speed cassettes, this CNC-machined, hardened steel tool fits 12-spline lockrings and a universal 1/2" drive. Perfect for home or professional mechanics, it ensures secure, accurate drivetrain maintenance. Buy your bike tools at Halfords, the UK's largest bike accessories retailer.