JCB Multi Purpose Drill Bit - 3 x 70mm

While it can handle masonry, it is not designed for hardened concrete or reinforced concrete with rebar; a specialized SDS masonry bit is recommended for that purpose.

Use a slower speed for metal and a moderate-to-high speed for wood and masonry.

It can be used with hammer-action for masonry, but it is primarily designed for rotary-only drilling for better precision in wood and metal.

If you find yourself having to apply significantly more pressure than usual to make progress, the carbide tip has likely lost its edge.

It can cut through mild steel, but stainless steel is highly abrasive and may dull the carbide tip very quickly.

Ensure the drill chuck is tightened sufficiently and verify the bit shank is free of oil or debris.

Reduce the drill speed (RPM) and apply cutting oil if working with metal; decrease pressure if working with wood.

Check that you are not applying lateral pressure (side-loading) while the bit is rotating.