RS PRO HSS Twist Drill Bit, 3.9mm Diameter, 75mm Overall

High speed titanium nitride coated jobber drill bits, suitable for a multitude of jobs and materials feature a longer shaft compared to other standard drill bits and can be used in both hand and machine drills. Suitable for drilling metal, wood and plastic along with a range of other materials, jobber drill bits feature right hand cutting tip with 118° cutting angle.

• Titanium Nitride Coated (TiN)
• Longer shaft length
• Right angle cutting tip
• 118° cutting angle
• Available in sizes from 0.25 – 20mm
• Suitable for metals, woods, plastics

Drill bits are attachments for power tools, like handheld or industrial size drills. They generally come in different shapes or sizes and drastically reduce the manual work needed for construction, electrical or masonry applications.

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.

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. As a standard drill can spin upwards of around 500 - 700rpm, the friction can cause a substantial build-up of heat. Something which would not be wanted when working with wood and plastic.

RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards; they’re only given the RS PRO seal of approval if we’re confident of their exceptional quality, which means you can be confident too.

DIN 338; BS 328-ISO 235/1