Descriptions:<br> These drill bits are made of M35 material, includes 5% cobalt, high hardness, stable performance. Cobalt steel extends cutting edge life and maintains cutting life after resharpening<br> Ideal for drilling on stainless steel, cast iron, sheet metal, steel plate, Angle iron.<br> Features:<br> Made of M35 material, includes 5% cobalt, high hardness, stable performance.<br> 135-degree split-point tip starts drilling immediately with less force and eliminates "walking" across the work surface.<br> Ideal for drilling on stainless steel, cast iron, sheet metal, steel plate, Angle iron.<br> With high surface finish, high grinding precision , the blade is sharp and durable in use.<br> It is widely used in the drilling of stainless steel plate, automobile spring steel and die steel<br> Cobalt steel extends cutting edge life and maintains cutting life after resharpening<br> Specifications:<br> Material: HSS CO/M35<br> Drill bit size(Optional):1.0, 1.5mm, 2mm, 2.5mm, 3.0mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 5mm<br> Quantity:10<br> Specification(mm)<br> Working length<br> Total length<br> Weight(g)<br> 1<br> 12<br> 30<br> 3<br> 1.5<br> 18<br> 40<br> 6<br> 2<br> 24<br> 49<br> 11<br> 2.5<br> 30<br> 57<br> 19<br> 3<br> 33<br> 61<br> 30<br> 3.2<br> 35<br> 65<br> 35<br> 3.5<br> 40<br> 70<br> 44<br> 4<br> 43<br> 75<br> 57<br> 4.5<br> 43<br> 80<br> 72<br> 5<br> 51<br> 85<br> 99<br> Package included:<br> 10 x M35 Cobalt Drill Bits<br> 1Made of M35 material, includes 5% cobalt, high hardness, stable performance<br> 2135-degree split-point tip starts drilling immediately with less force and eliminates<br> 3Ideal for drilling on stainless steel, cast iron, sheet metal, steel plate, Angle iron<br> 4With high surface finish, high grinding precision , the blade is sharp and durable in use<br> 5It is widely used in the drilling of stainless steel plate, automobile spring steel and die steel