Apex MSF-18MM15 Metric Hex 6-Point Surface Drive Fixed Magnet Standard Length 1/2" Square Drive 18 mm Power Socket Tool Side - Drive Size: 1/2" Square Drive Fastener Side - Drive Size: 18 mm Hex Socket Overall Length (OAL): 1.5" (38.1mm) Features Impact Rated; Meets or Exceeds Proof Torque Requirement for Impact Standard ASME B107.112 High-Carbon Alloy Steel and Proprietary Heat Treat Process Yields Greater Strength and Longer Life Cutting-edge Machining Process Allows Apex to Meet or Exceed Licensor Standards, Resulting in Tighter Tolerances and Superior Product Consistency Better and More Consistent Fit to Fasteners Leads to Better Torque Transfer Surface Drive- Large openings on the six corners of the hex end opening create a "floating" action that allows teh socket to slip quickly and easily onto the nut or bolt. Ideal for compensating for imperfect alignment between the tool and fastener. Magnetic sockets hold the fastener in driving position, even when working straight down. Time-wasting motions are eliminated when starting fasteners or working in hard-to-reach areas Click Here to view similar options