General description Sealey AK7181 Premier Imperial Lock-On™ Extra-Long Ball-End Hex Key Set includes 9 pieces designed for professional use. Manufactured from durable Chrome Molybdenum steel with a polished satin finish, this set is ideal for removing rusted, damaged, and severely rounded hex head fasteners with ease. The patented twist design on the short-arm grips tightens as they turn, preventing fasteners from rounding. Technical specifications Material: Chrome Molybdenum steel Finish: Polished satin Key lengths: 88mm to 225mm Key sizes: 1/16" to 3/8" Ball-end allows driving at angles up to 25° Contents: 1/16", 5/64", 3/32", 1/8", 5/32", 3/16", 1/4", 5/16", 3/8" Model No.: AK7181 EAN: 5054511718607 Other information Supplied in an easy-access case with a hanging tag for safe storage and quick key selection. Lifetime guarantee*