Sipery 10Pcs M35 Cobalt HSS Twist Drill Bits 4mm with Straight Shank, Drilling for Stainless Steel, Copper, Aluminum Alloy and Softer Materials
- Specification – 10Pcs 4mm cobalt drill bits, each kit contains a total of ten drill bits in the same size, Blade length: 43mm/1.7inch, 118 degree point, straight shank..
- Material – HSS Cobalt high speed steel for super abrasive resistance in tough metals, improve much higher heat resistance because of cobalt steel’s high red hardness..
- Durable – HSS Cobalt Drill Bit provide strong durable performance compared to typical hss drill bits..
- Easy to Carry – The twist drill bits are housed in plastic case for easy storage, easy to carry out homework..
- Multi-purpose Use – HSS Drill Bits are successful in cutting hard metals such as stainless steel, copper, aluminum alloy, and also can be used for softer materials..