PREMIUM QUALITYHighduty heattreated Tungsten steel construction highhardness wearresistant and its service life is 510 times longer than that of nontungsten taps and reliable for your longlasting use EXCELLENT PERFORMANCE-Fully ground & highprecision tap is supersharp for your tapping and chip removing operation running smooth and efficient offering you excellent performance REINFORCED STABILITYEach dies is designed with a lock hole it can be locked tightly after the screw is aligned and locked ensures double stability during your operation ADJUSTABLE TAP WRENCHTap wrench is adjustable you can set the adjustable basin wrench to either its position for turning clockwise tightening or turning anticlockwise loosening). You can do this by flipping the jaws 180 degrees over its pivot. MOST POPULAR SIZES INCLUDED-This tap and die set comes with 110 pieces in total: 35 pcs taps, 35 pieces taper taps, 35 pcs dies, 2 tap holders(M2 - M12 (1/16" - 1/2"& M6 M20 14 34 2 die holders 200mm 1 diameter bore 270 mm 1 12 diameter bore and 1 Tbar tap wrench most popular sizes included Friendly NoteThis product is only suitable for repairing Not applicable for heat treated products and coating products, Manufacturer: GQNBLVHZUPDM