Mũi Khoan Xoắn Tốc Độ Cao 1 / 2 14mm-20mm Bằng Thép

Description: Made of high speed steel construction for proven capability and durability. Twist design: increases cutting speed with self-centering and prevents walking, clears chips and particles faster Suitable for all kinds of stainless steel, ordinary steel, angle iron, aluminum, copper, wood and other materials drilling. For precise drilling, electronic assembling, tool making, model making, jewelry engraving, and hobbies. Set includes: 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm Specification: Material: high speed steel Size Chart: Size: 14mm/0.55inch, 15mm/0.59inch, 16mm/0.55inch, 17mm/0.63inch, 18mm/0.71inch, 19mm/0.75inch, 20mm/0.79inch Package Includes: 1 Piece Twist Drill Bit