Cobalt drills are an excellent compromise. Harder the HSS drills, less brittle than Tungsten Carbide but can still be sharpened to extend their usable life. Expensive but probably worth the investment if you can afford them.
£27.99
as of 2024-10-12 09:56
Amazon.co.uk
£9.99
as of 2024-10-12 09:56
Amazon.co.uk
£14.99
as of 2024-10-12 09:56
Amazon.co.uk
Last updated on 2024-10-12 09:56