BALL GRIP Ratchet Interchangeable Screwdriver Tip Interchangeable Ratchet Screwdriver . Interchangeable with 1/4” Hex shank bits. Powerful Rare-Earth magnet with SUS holder head keeps strong magnet force forward . Functionally enhanced BALL GRIP with 36-teeth gear ratchet for smooth driving by simple repeated finger or wrist movement . Using as a stubby ratchet by popping off the blade and inserting 1/4 Hex shank bits . High wear-resistance and durable fully hardened shank by optimum heat treatment . Ergonomic BALL GRIP™ for anti-fatigue and various ways of driving 2200MBH120