- last price $14.50
The M35 Cobalt Steel drill bits are made of M35 grade steel alloy with cobalt. The cobalt increases the strength of the steel and makes it more heat-resistant. Perfect to have in your toolbox when drilling horseshoes to add corks or plugs for traction. If you are using 3/8" threaded studs, use these 5/16" bits to drill holes in your shoes, then tap with a 3/8" tap.