![]() This is GRAFF universal step drill bit made of HSS high strength steel. During drilling, the next step deburrs the previously drilled hole. GRAFF step drill bit for metal 6-40.5 mm. Use the correct drill speed to ensure the ideal drill bit performance in the material being drilled. -Select-, Name: A-Z, Name: Z-A, Newest - Oldest, Oldest - Newest. Ideal for sheet metal without pre-drilling in sheet metal, aluminium, plastic & fibreglass. Matching the correct drill bit to the intended application will maximise the life of the bit. For technical drawings and 3-D models, click on a part number. This set from Neiko comes with three unibits there’s a 1/2 one for general use, a 3/4 one for larger holes, and another 1/2 one with more steps for more precise drilling. After multiple sharpenings, the drill bit diameter may become smaller. In this section, we’ll showcase some of the best step/uni drill bits you can buy right now. The 82 countersink angle is compatible with the profile of flat- and oval-head inch screws. ![]() They are also referred to as cone drill bits, uni-bits, or multiple diameter bits. ![]() Optimised for use with high speed cordless drills. Also known as step drill bits, these bits countersink as they drill. Step drill bits are a must have in your toolbox. It is suitable for drilling the following materials up to maximum thickness 3.2mm: stainless steel, plain carbon steel, bronze, brass, copper, aluminium and plastics. Step Drill Bit HSS M2 Fully Ground Step Drill Bit For Metal Spiral Grooved Multiple Hole Drilling Cone Drill Bit Stepped Up Bits For DIY Lovers with 10mm Tri-Flat Shank (4-32mm Step Bit -15 Steps) 4.2 out of 5 stars 27. Produced from custom engineered steel with black oxide coating for 4 x longer life. The HSS Step drill bit consists of 12 sizes in a single bit and is made of High Speed Steel. ![]()
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