Bosch TRINBOR 4-12MM HSS 9 TRIN

The step drill bit is made of HSS (high-speed steel) and provides a long lifespan when used with coolant. Laser-marked numbers on both flutes provide highly visible and durable marking of the hole diameter. Additionally, the 3-flat shank prevents slipping in the drill chuck and provides efficient transmission with high torque. The HSS step drill head delivers smooth, burr-free drilling in multiple diameters with a single bit. It is ideal for deburring, drilling round holes, and enlarging existing ones. No center punch is needed because the split point allows for easy starting. Its CNC-ground f lute enables optimized chip removal and less vibration for smooth drilling. The most optimal cutting edge and absolute smoothness are ensured thanks to axial and radial relief grinding. This step drill bit is suitable for use on thin materials such as non-ferrous metals, sheet plastic, sheet steel, plastic, and stainless steel. 9 steps Ø 4-5-6-7-8-9-10-11-12 mm