FeaturesExpandable sleeve for fast, straight driving 2-piece construction withstands abuse in impact applicationsProprietary steel and heat treat process for maximum strength and durabilityC-ring retains the insert bitStainless steel sleeve extends for improved fastener stabilityMagnet holds fasteners to the drive guideCustom alloy 76 steel maximizes resistance to wear and shockFor use with 1 in insert style driver bitsStrong magnetic tip for secure Grip®