Bosch HSS-G Twist Drill Bit, 3.9mm Diameter, 75 mm Overall

High Speed Steel metric sized drill bits suitable for alloyed and non-alloyed steel, cast steel, iron and hard plastics.

Precision ground for a faster drilling rate and lower feed pressure
Self centring drill bits

• DIN338
• DIN1412C Quadruple Sharpening
• Bosch Standard Quality

These bits are ideal for fast drilling of a plug, anchor or clearance holes in a number of materials such as steel, plastic, wood, metal etc. This makes it an essential piece of kit to have if you work within the carpentry/construction/engineering industries to save time and money on being able to perform more efficiently when working with stubborn materials.

Can these drill bits be used with any SDS drill?
No, they are standard drills, will not fit into SDS chuck

What does jobber mean?
The word jobber specifies the length of the drill bit. This generally means the length of the entire drill bit itself is significantly longer for diameter it has. As an example, a mechanic drill bit will have a much shorter flute and therefore have a much smaller overall length.

What are HSS and HSS-G?
An acronym for High-speed steel, HSS is generally the go-to type of steel needed for drill bits due to their excellent heat resistance at high speeds. The HSS-G drills bits are additionally ground at the tip and along with their flutes. HSS-G drill bits are ideal for high-performance, professional application and are ideal for drilling into an alloy and non-alloy steel, non-ferrous metals, grey cast iron and malleable iron, sintered iron.

DIN 338