RS PRO 2-Piece Step Drill Bit Set for Metal, 5 mm Min, 31 mm Max, High Speed Steel, Model 499-302

RS PRO 499-302 2-Piece Step Drill Bit Set for Metal comprises two high quality step drill bits designed for efficient and precise drilling on various metal surfaces. These bits provide a minimum drilling diameter of 5 mm and a maximum diameter of 31 mm, making them versatile for a range of industrial applications.

Constructed from High Speed Steel (HSS) with a Titanium Aluminium Nitride (TiAlN) coating, the drill bits offer excellent wear resistance and extended tool life, especially when working with tough materials. The spiral tap design allows burr-free drilling, planing of pipes, sheet metals, and profiles, as well as moulding and retro drilling tasks.

The three-faced driving shaft design prevents slipping within the drill chuck, ensuring steady and reliable operation. The diameter guide is laser-etched directly on the tap, offering legibility even when the bit is rotating, aiding in precision drilling without the need for center-punching owing to the crosswise grinding technology.

This set is ideal for use on construction steel, chromium-nickel steel, non-ferrous metals, plastics, plexi glass, and wood materials up to 5 mm thickness. It is important to note that these bits are not suitable for aluminium and should be used without cooling agents to maintain their integrity.

The set includes 1 piece of 4 to 20 mm hole cutter and 1 piece of 5 to 31 mm hole cutter, providing flexibility for diverse metalworking tasks. The set includes 2 step drill bits with sizes ranging from 5 mm to 31 mm. High Speed Steel material ensures durability and precise drilling performance.

TiAlN coating for enhanced wear resistance on tough materials. Laser-etched diameter guide improves drilling accuracy. Three-faced shaft design prevents slipping during operation. Suitable for construction steel, stainless steel, non-ferrous metals, plastics, and wood up to 5 mm thick.

Spiral tap design for burr-free holes and ease of use. Crosswise grinding negates the need for center punching. Not intended for aluminium or use with cooling agents.

This drill bit set is suited for industrial, mechanical, manufacturing, and metalworking applications requiring reliable metal hole cutting, shaping, and expansion. Its robust design supports professional use in workshop and construction environments.

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