General description Sealey HSS Cobalt Fully Ground Drill Bit 4mm - Pack of 10 is designed for precision and durability. Manufactured to DIN 338 standards, these drill bits feature 5% cobalt content, which enhances heat hardness and extends the life of the bit. The 135° split point design is self-centering, reducing thrust and facilitating easier penetration, making it suitable for drilling high carbon and stainless steel. Technical specifications Model No.: DB040CB Size: Ø4mm Pack Quantity: 10 Material: HSS Cobalt with 5% Cobalt Manufactured to: DIN 338 Other information