BOSCH PRO HSS-Co Cobalt Metal Twist Drill Bit Set, 25 Pieces, 1.0-13.0 mm

The Bosch Pro HSS-Co Cobalt Metal Twist Drill Bit Set is a 25-piece collection for metal drilling. Each bit is made from cobalt-alloy high-speed steel. The set is rated for alloyed steel, non-alloyed steel, cast iron, and stainless steel. Its intended applications include metalworking, installation, maintenance, and general workshop drilling. All included pieces are twist drill bits, so the selection is focused on producing holes rather than providing mixed driving accessories.

The diameter selection covers both fine drilling and larger openings within a single set. Regular size progression allows the hole diameter to be increased in controlled stages where required. Cylindrical shanks support use across compatible handheld and stationary drilling equipment with the appropriate chuck. A supplied carrying case keeps the individual diameters separated and easier to identify. The enclosed format also protects the set during workshop storage or transport between jobs.

• 1.0–13.0 mm diameter range covers a broad selection of metal-drilling sizes.
• 0.5 mm size increments provide 25 individual diameters across the stated range.
• 135° point angle helps each bit centre accurately on hard metals.
• Cylindrical shanks suit compatible rotary drills, drill/drivers, and drill presses with an appropriate chuck.
• Protective ProBox case provides organised storage and transport.