Step Drill Bit Set: Sizes: 4-12mm: 9 Steps (4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm,12mm) 4-20mm: 9 Steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm,16mm,18mm,20mm) 4-32mm:15Steps(4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm, 24mm,26mm,28mm,30mm,32mm) Automatic Center Punch: 7.4 x 2.6 x 0.7 inches
Features ◆100% brand new and high quality. ◆High speed steel for longer service life. ◆Automatically Deburrs Holes as you Drill. ◆Double cutting blades design enables a faster and smoother cutting. ◆The sharpness and titanium coating ensure easily cut through most sheet metal,plastic and some other materials with ease.
Notice 1.When use the drills, please always wear protective goggles, mask and gloves. 2. Don't touch it with your hand as the drill will produce heat when using, there will be the danger of burning. 3.Please pay attention that the product need to be cooled by water injection when you use the product drill metal plate.The step drill is easy to become soft because of high temperature. If you don't cool the drill, it will be scrapped quickly. 4.Our drills are HSS High-speed steel 4241, you'd better not use it to drill the material that is same as our product or drill the material that the hardness is higher than our product.
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