RS PRO HSCo Twist Drill Bit, 4.2mm Diameter, 75 mm Overall

Brought to you by RS PRO, a range of jobber drill bits suitable for high-speed metal, wood and plastic drilling. Designed as a twisted drill bit, these attachments guarantee excellent performance and will be an asset to your application. All models are highly reliable and excellent quality.

• Plan Shank
• Various lengths
• Cobalt (5%)
• HSS for performance and safety
• Perfect for general workshop and maintenance use

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.