Wakuka Cobalt Drill Bit Set -115PC M35 High Speed Steel Twist Jobber Length for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Metal Indexed Storage Case, 1/16″-1/2″, A-Z, 1-60. 135° SPLIT POINT TIP & TWIST DESIGN: Automatically centered and reducing walking, clear chips faster WIDE APPLICATION: Stainless steel, steel, cast iron, aluminum alloy, copper, plastic, wood DURABILITY & CAPABILITY:M35 cobalt dill bits are durable, higher heat resistance and wear resistance. Drill Bit Set:115 PCS drill bit set include 29 fractional sizes 1/16″-1/2″ by 64ths; 26 letter sizes A to Z; 60 numbered wire gauges 1 to 60 with a metal storage case. Higher Quality:Each HSS bit contains 5% cobalt; this material gives the bit a longer life. Drill Design:135 split bit design, which ensures sharp cutting of hard materials while preventing the bit from accidentally slipping away while working. Twist Design:Torsional body design for faster chip and particle removal. Wide Application:M35 HSS 5% cobalt twist drill is widely used in a variety of applications such as engineering, home improvement, crafting; suitable for drilling stainless steel, cast iron, high temperature alloys, titanium alloys, even hard plastics, and wood, and many more soft materials. Material: High Speed Steel, Stainless Steel, Alloy Steel, Cobalt Steel, Cobalt. Cutting Angle String: 135 Degrees. 16.22 x 6.18 x 3.9 inches; 7.4 Pounds. Best Sellers Rank: #159,115 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #412 in Jobber Drill Bits. #412 in Jobber Drill Bits. Customer Reviews: 4.0 4.0 out of 5 stars 8 ratings. Except on weekend or public holidays. We stand behind our products. Your receive the wrong item.