Bosch Metal Twist Drill Bit Cobalt-Alloyed High-Speed Steel 3.5 x 70 mm

The Bosch HSS-Co Twist Drill Bit 3.5 x 70 mm is a single metal twist drill bit made from cobalt-alloyed high-speed steel. It is intended for drilling holes in metal rather than serving as a mixed bit set. Rated materials include cast iron, cast steel, non-alloyed steel, stainless steel and other steels. The HSS-Co construction provides improved heat resistance and durability during demanding drilling work. Its single-size format suits tasks that require one consistent hole diameter.

The bit measures 70 mm overall, while 39 mm of that length is the working section. It is designed for compatible power drills and rotary hammers equipped with a suitable chuck. As a power-tool accessory, it relies on the connected tool to supply the drilling motion. The individual format is relevant as a replacement bit or as an addition to an existing drill-bit selection. It can also be carried separately when the work only requires this specific diameter.

• 3.5 mm cylindrical shank fits a suitable chuck accepting this diameter and shank style.
• 135° point angle defines the geometry at the drilling tip.
• Two cutting edges form the hole during rotation.
• 3.5 mm maximum drilling diameter in steel matches the stated working diameter.
• 10 g weight keeps the individual accessory light.
• Bronze finish provides a visually identifiable surface colour.