Clarke Twist Drill Bit Sets

These precision ground HSS drill bits, with black enamelled flutes, are designed principally for drilling larger holes in ferrous and non ferrous metals. They each have a characteristic shank machine

A useful, and hard wearing, set of drill bits that are designed specifically for drilling larger diameter holes in both ferrous & non ferrous metals. Each bit has a machined-down 13mm diameter shank a

A 30 piece metric metal drilling bit set surfaced with titanium which improves penetration and increases wear resistance by up to 6 times.

Cobalt steel drills offer higher heat and abrasion resistance, making them more suitable for drilling hardened steel, super alloys, titanium and stainless steel

A substantial set of quality HSS drill bits coated with titanium nitride for increased durability & service life. They're ideal for general purpose drilling tasks in most common materials including ha

A large set of the most commonly used sizes of HSS drill bits, housed in a handy storage case with a compartments tray. Ideal for general purpose drilling tasks in most standard materials.

Cobalt steel offers greater resistance to high temperatures and abrasion than conventional high-speed steel (HSS). These quality cobalt steel drill bits are ideally suited to drilling hardened steel,

A 30 piece imperial metal drilling bit set surfaced with titanium which improves penetration and increases wear resistance by up to 6 times. Sizes included in set 1/16, 5/64, 3/32, 7/64, 1/8, 9/64

A comprehensive 19 piece HSS drill bit set in convenient dial box.