Tap Wrench Twist Drill Bit Set: T-handle tap wrench with 3.5mm-4.5mm capacity. Thread taps size included: M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1.0. Twist drills size included: 2.5mm, 3.5mm, 4.2mm, 5.2mm. T-handle Wrench: T-handle tap wrench is used to hold small tools to be turned by hand, such as taps, drills, reamers, screw extractors. Tap wrench features a sliding handle. It can be removed or positioned. Can be extended full length in either direction for leverage when working in tight places. Thread Taps: High-speed steel taps are with high hardness and toughness for wear resistance. Can make new threads or re-thread damaged or jammed threads. Tap most materials in through or blind holed conditions. Twist Drill Bits: Twist drill bits can drill holes in iron, stainless steel, copper, aluminum, wood and plastic. Can be clamped on manual or electric hand-held drilling tools, drilling machines, milling machines, lathes, and machining centers.