M35 5% Cobalt Drill Bits Set 115PCS (1/16″-1/2″, A-Z, 1-60), Straight Shank Jobber Drill Bits, Metal HSS Twist Drill Bits for Stainless Steel Hard Metal and Cast Iron. 5% COBALT TWIST DRILL BITS SET? Made from M35 Cobalt Steel with Molybdenum and Cobalt added to form a hardened alloy, can measure up to 67 Rockwell hardness, cut faster, last longer, and last longer than normal HSS drill bits 12 times. 115PCS SAE DIRLL BITS SET? The set includes 29pcs Fractional Size:1/16″ to 1/2″ in 1/64th increments; 26pcs Letter Size: A To Z; 60pcs Numbered Size: #1 To #60. Comes in metal indexed storage case for easy storage. TWIST DESIGN AND PERFORMANCE? Precise 135° SPLIT Point, Gold Oxide Surface and Round Straight Shank. Prevents walking and removes chips and particles faster. Precision fully ground to ensure smooth chip movement. PROFESSIONAL AND WIDELY USED? M35 Cobalt High Speed Steel is more suitable for hardening materials. Ideal for cutting stainless steel, steel and cast iron as well as wood, aluminum alloys and other metals. Not suitable for glass or ceramic materials. Pay attention to speed, pressure and heat control when drilling. SERVICE? If you have any problem with our metric drill bit set or are not satisfied with the product, please feel free to contact WildBossy. Made from M35 Cobalt Steel with Molybdenum and Cobalt added to form a hardened alloy, which can ensure sharp, fast work and retain strength and efficiency. The surface is treated with a titanium alloy, which greatly improves the cutting performance of the drill, is more wear-resistant and prolongs the service life. Previous users have always loved this product. Precise and accurate drilling hole. Reasonable storage mode, effectively prolong the service life of the drill bit. Using high quality HSS process, the use of drilling machine, making the drill bits sharp and durable. You will make a difference in the quality of each drill hole. Struggling to find the right drill? Our drill bits are1/1.5/2/2.5/2.5/3/3.5/5/5.5/7.5/7.5/8/8.5/9/9.5/10 mm hss metal bits. All in one storage bin. 135-degree self-centering split pointed tip combines active cutting and perfect centering without wandering. We were always there. Every attempt can yield good results, and stand up for your every action when it is needed most. We’ll guard it. Work efficiently, save time for each use, and maintain a productive lifestyle. The correct scale is a sign of serious attitude at work every time. 14 x 5 x 2.8 inches; 7.05 Pounds. (1/16″-1/2″, A-Z, 1-60)115PCS. Product Dimensions: 5.0 inches x 14.0 inches x 2.8 inches. Weight: 7.05 lb. We reserve the right to cancel any order for any reason at any time. We are not responsible for undeliverable addresses. Your satisfaction is guaranteed! All of our items, unless otherwise stated, will only run on 120 volts. Please check to make sure your country complies with these specifications. We will work with you to resolve any problem you may have.