All Platinum Tech¿ Ratcheting Wrench Sets Feature a Patented Spherical Spline Design that Works on (6) Different Fastener Types: Spline, 6-Point, 12-Point, Star, Square & 50% Rounded off Heads Offset box end gear provides more surface contact and access to recessed fasteners 72-Tooth ratcheting system for high torque & 5¿ swing arc for operation in tight areas Sliding switch button for quick change ratcheting direction 180º flex feature & extra-long reach allows access to hard-to-reach places High-polish, chrome-plated chrome vanadium steel for good looks and exceptional strength