115 PCS HSS Cobalt Drill Bit Set, Twist Jobber Drill Bits Set, 135-Degree Split Point, Fractional 1/16″-1/2″, Letter a – Z, Wire #1 – #60 with Metal Indexed Storage Case. DRILL BITS SIZE: Jefe Hex 115 pcs set includes 29 pcs fractional sizes from 1/16″ to 1/2″ by 64ths increments; 26 pcs letter sizes from A To Z; 60 pcs wire sizes from #1 to #60. Almost cover all sizes you would use. COBALT JOBBER DRILL BITS:115 pcs high speed steel with 5% cobalt drill bit set can resist high heat abrasion while drilling. M35 cobalt HSS twist drill bits is more suitable for hardened working material. Particularly adapt to drilling stainless steel, cast iron, high temperature alloy, titanium alloy and even hard plastics, and woods. Can also be used for soft materials. TWIST DRILL BITS: Premium HSS with 5% Cobalt and 135° split point drill tip design 115 pcs drill bit keeping sharpness while drilling hard materials and prevent tips walking on the working surface. Proper twist and flute design clears chips and particles fast. WIDE APPLICATION: Jefe Hex 115 pcs set with sharp and hard cutting edge is ideal for versatile application especially for projects made from hard material, such as kitchen utensils, machine parts, medical equipment, DIY projects and so on. ORGANIZED HOLDER: The whole drill bit set is kept in one iron case with size index holder for easy storage and organizing. 1/16 Inch – 1/4 Inch. Cobalt High Speed Steel. 14.57 x 6.14 x 3.82 inches; 8.66 Pounds. Cobalt Drill Bits(115 PCS). Product Dimensions: 6.14 inches x 14.57 inches x 3.82 inches. Weight: 8.66 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.