Care Tips: If you have any questions, please refer to us and we will be happy to help you Laser engraving logo can quickly and accurately tell you the drilling size, making your drilling more convenient and accurate. You will obviously feel that it is more solid than conventional titanium material, and it will also make you feel unprecedented smoothness in the drilling process. Discover a wide range of metalworking multipurpose drill bits at low prices on Ubuy Bhutan. About this item FOUR SPIRAL FLUTE - Four cutting blades design guarantees a faster and smoother cutting. Feels like a hot knife through butter! TiAlN COATING - With 89HRC surface hardness, harder materials can be cut and higher cutting speeds can be achieved. M35 COBALT HSS STEP DRILL - Prefect for 1/8 (3mm) thick Stainless Steel/Wood/Plastic/Aluminum Sheet/Copper and other metal sheets... At the same time, you do not need to change the drill frequently, saving your precious time Water injection cooling during operation will significantly improve drilling efficiency and prolong bit life. Four Spiral Flute: Compared to ordinary step drills and double and three sprial flute step drills, the cobalt step drill has a unique four sprial flute design that will make the entire cutting process smoother and bring you the pleasure of cutting butter cubes The 1/4-inch thick hexagonal handle can prevent the drill chuck from sliding and reduce impact. It will be more excellent than you think Sizes Include:High qualityFlexible to useNeat and tidyEasy to storeDurable and long-lasting HSS 4241 Cobalt Multiple Hole 50 Sizes Step Drill Bit Set Tools Aluminum Case Metal Drilling Tool for Metal Wood Step Cone Drill (Size1-4-20mm Step Drill Drill Hog 1/8-1/2" Bit Spiral Flute Cobalt UNIBIT Lifetime Warra Meche A Metal 9 Hole Sizes: The specification of the step drill is from 1/4 - 3/4: 1/4, 5/16, 3/8,7/16, 1/2, 9/16, 5/8, 11/16, 3/4. M35 Cobalt Material: This is a M35 cobalt step drill. This item: FOCSTOL Cobalt Step Drill Bit - 1/4''-3/4'' Four Spiral Flute HSS Step Drill Bit M35 with Quick Change Hex Shank for Stainless Steel Metal Aluminium Copper Plastic Wood