3pcs HSS Titanium Step Drill Bit Set 3-12mm 4-12/20/32mm Drilling Power Tools Metal High Speed Steel Wood Hole Cutter Cone Drill

Features: 1. Titanium coating reduces friction and heat. 2. High-speed steel pedal drilling is of higher quality and durable than ordinary twisted drilling. 3. These drill bits are very suitable for creating smooth, clean and perfect round holes. 4. Suitable for perforated metal, iron, aluminum, bra, wood, plastic, etc. Note: 1. Hand drills and bench drills can be used for these steps. 2. Use water injection for cooling when drilling, which can effectively extend the life of the drill. 3. The recommended drilling rate is 250-400 RPM. 4. You can use our step drilling machine to drill within 5mm. 5. Remember, only M35 step drilling is suitable for stainle steel. Never use these HSS 4241 step drills to drill stainle stee!!! ---------------------------------------------- Hexagonal shank straight flute step drill: 1. Unique stepped structure, a drill bit can open a variety of specifications and sizes of apertures, and a step drill can fit a box of drill bits. 2. No center punch is needed, and it is not easy to break compared with ordinary twist drills. For on-site construction, one step drill is suitable for multiple specifications. 3. It becomes poible to deburr, chamfer, open oval holes to expand, and functions that twist drills cannot accomplish. 4. Compared with ordinary twist drills. The shaking is small, and the beautiful aperture can be opened without first using the center punch. 5. Use tools: drill, bench drill. Water injection cooling while working can effectively extend the life of the drill bit. The recommended drilling speed is 250-400 rpm. Material: High-speed steel 4241 (suitable for work with a hardne below 25°, such as plastic/aluminum plate/PV plate/insulation plate and other workpieces with a thickne of le than 5MM) Surface treatment: Titanium plating ---------------------------------------------- Hexagonal shank straight flute step drill: Specification: 4-32mm (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm) 4-20mm (4, 6, 8, 10, 12, 14, 16, 18, 20mm) 4-12mm (4, 6, 8, 10, 12mm) 3-12mm (3, 4, 5, 6, 7, 8, 9, 10, 11, 12mm) ---------------------------------------------- Package list: 1 Pc x 3-12/4-12/4-20/4-32 mm Straight flute step drill or 3 pcs set A: 1 Pc x (3-12mm + 4-12mm + 4-20mm) Straight flute step drill + 1 Pc x cloth bag or 3 pcs set B: 1 Pc x (4-12mm + 4-20mm + 4-32mm) Straight flute step drill + 1 Pc x cloth bag or 1 Pc x Automatic center punch or 3 pcs set C: 1 Pc x (3-12mm + 4-12mm + 4-20mm) Straight flute step drill + 1 Pc x cloth bag + 1 Pc x Automatic center punch or 3 pcs set D: 1 Pc x (4-12mm + 4-20mm + 4-32mm) Straight flute step drill + 1 Pc x cloth bag+ 1 Pc x Automatic center punch ---------------------------------------------- Note: 1. Item measured by hand, it could be 1-10mm different, your kind understanding will be highly appreciated. 2. Remember that due to lighting effects, monitor's brightne / contrast settings etc., there may be some slight differences in the color tone of the website photo and the actual item. 3. Due to long shipping, the item may be damaged in transit, if the item is damaged, please contact us immediately before leaving feedback, thanks for your understanding. < img src="http://ae01.alicdn.com/kf/H78d5f031db9b4e50a48fb43ecf60d42dV.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/H99d3fcaf74934f61bdefff0de8ca2d2aT.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/Hd826065f6be04cd39fa815ac31e90e92j.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/Hd4ee04dcc47c4402b1e506c87ac6023dC.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/Hb97e065e1e3d4bc095726969d3a2933a6.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/H60dde6954e41486b91ca9372c7ac00d3a.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/H54bc3ac9bfd848d08952669164416306J.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/Hf920f224cbce4a139bc2fc54f0f2153ez.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/H5647cd4089024cef8ee21baee52f07d63.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/H89b111d10bf0439aa647b4d5900f1c4dG.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/Ha015d96cf2b74931940404ac67c2f2ddJ.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/Hf1a133b049954b289037cf42d66109cfZ.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/Hc9a7c823b55b44d4b313706ac460c100H.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/Hb5d0f187de444014a2f735dae6b0cd77Y.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/> < img src="http://ae01.alicdn.com/kf/H5fa2181664914642bc11c0d052a0db52a.jpg?width=1000&height=1000&hash=2000" slate-data-type="image"/>

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