The Wolf Tooth Components Cassette Lockring Pack Wrench Insert is designed to work with the Wolf Tooth Pack Wrench. This insert is compatible with Cassette lockrings and some centrelock rotor lockrings. Each insert is CNC machined in the USA of hardened steel with electroless nickel plating and is held in the wrench by a series of magnets. The Wolf Tooth Pack Wrench system is perfect for mobile wrenching without the weight. Features: Includes the Cassette Lockring insert only. Wrench is not included but can be purchased separately Steel hex wrench inserts were designed to pair with the Pack Wrench Simple and easy size adjustment system The aluminum wrench (sold separately) has magnets that hold the inserts in place Made in the USA and CNC machined from hardened steel with electroless nickel plating Specifications: Weight:31g Material: Nickel Plated Hardened Steel Color: Silver