3 Pics HSS6542 M2 Steel Spiral Groove Unibit Step Drill Bit Set For Stainl
3 Pics HSS6542 M2 steel Spiral Groove Unibit Step Drill Bit Set for Stainl Good products DIY Supplies: Woodworking Brand Name: fixmee Type: Core Drill Bit Features: Suit for use in hardness under 28°artifacts,The plate thickness under 5 mm You can use water to cooling it when it is work and it can be used for even longer You can use one drill for different aperture No need of center punch.Compared with the ordinary twist drill,it is not easy to break and it can be used for deburring, chamfering and open hole Recommend the drilling speed of 250--400 rpm Specifications: Material:HSS6542 Shank Type:Triangle shank Type:Spiral groove Size: 003: 4mm to 12mm 9 Steps ( 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm ) shank diameter 6mm 002:4mm to 20mm 9 Steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm,18mm,20mm) shank di...