General description Satin finish Chrome Vanadium socket with knurled ring, designed for durability and ease of use. This 7mm long hex socket bit features an S2 Steel hex shaft and is suitable for the removal of brake caliper fasteners. Please note that it is not intended for use with impact type ratchets. Technical specifications Model No.: AK657 Material: Chrome Vanadium Hex shaft material: S2 Steel Drive size: 1/2" Length: 7mm Other information Lifetime Guarantee* Warning: Not for use with impact type ratchets.