Features: -Excellent value and high quality. -This tool makes for a great investment for all bike mechanics - from DIY mechanics at home or professionals in the workshop! -Strong, tough and durable, this freewheel remover is designed to last. -Next time you want to change your cassette, be prepared! -Heat treated alloy tool steel, one inch base fits wrench or bench Specification: Internal diameter: Approx 20mm Color:Black Material:Carbon steel Package: 2pcs piece of Lockring tool