53 pc Metric Tap & Hex Die Set no checkout Tough brass hinge pin is Tough brass hinge pin is durable and allows both jaws to carry current Enclosed heavy duty spring assures a powerful bite on the work Insulation on top and bottom jaws provides extended spring life Designed for optimized performance on stainless steel tube Contoured frame allows for easy alignment while adjusting the cutter to make a cut X CEL® Knob allows for easy adjustments and quicker cutting Six individual bearings in the 15 SI and 35S and 12 in the 65S replace traditional rollers Irwin tap and die set comes in a molded plastic case with gauge guide on the inside lid Set includes all companion threading tools