XMSSAA Step Drill for Stainless Hexagonal Spiral Hole Bamboo Shoot Cone Cobalt High Speed Titanium Nitride Aluminum for M35 4-blade Steel, 4-20mm/9

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[Four-blade step drill] The four blades make it possible to drill holes that are close to perfect circles. Compared to conventional two-blade drills, the load on each blade is distributed, resulting in superior durability and cutting performance. In addition, the stability during rotation, chip removal efficiency, and cooling efficiency are outstanding, so you can expect a long life. [Conical drill for stainless steel] The spiral shape is ideal for stainless steel, allowing for smooth drilling with less welding. An essential tool for drilling holes in stainless steel, thin iron plates, aluminum plates, wood, vinyl, resin, etc., household DIY, enlarging pilot holes, chamfering, deburring, etc. A must-have item for home and work. [Cobalt High Speed Steel Drill] The surface of the HSS-Co M35 steel drill is coated with AlTiN titanium nitride to increase the aluminum content and strengthen the surface, resulting in a hardness of HRC89. It has better heat resistance than ordinary step drills and reduces the heat generated during friction. It improves the high temperature resistance and grinding resistance of the drill, making it ideal for high speed drilling. [Scope of application] The step drill expands holes from small holes to large holes in sequence, so it is possible to drill multiple sizes of holes and enlarge and correct holes. In addition, since the shaft shape is hexagonal, it can be used with impact drivers, electric drills, and rechargeable drills. [Improved cutting efficiency] Because it uses four blades for cutting, the load on each blade is distributed. This allows cutting with fewer rotations, improving cutting efficiency and extending the tool life. [Size] Four blades (4-20mm), 9 steps (4,6,8,10,12,14,16,18,20mm)