Titanium Step Drill Bit, High Speed Steel Step Drill For Metal and Drills For Hard Materials ,4-52mm Total 12 Steps

الوصف

HSS4-52 Titanium Step Drill Bit, High Speed Steel, Total 12 Step Sizes Spiral groove stepped drill Specifications: 4-52mm Material: High speed steel Packing: according to customer requirements Surface treatment: Titanium Cutting material: thin iron plate, aluminum, insulation board, PVC board wood thickness of 4mm. With a drill to play a variety of holes. Ladder drill Features: 1 a unique staircase structure a drill to open a variety of size aperture size, a step drill drill arrived on a box. 2 do not use the center punch, compared with ordinary twist drill is not easy to break. Site construction, a ladder drill a variety of specifications apply. 3 deburring, chamfering, oval hole expansion, twist drill can not complete the function it becomes possible. 4 compared with ordinary twist drill. Shaking small, do not need to use the central punch can also open a beautiful aperture out. Use tools: pistol drill, bench drill.