Review on 🔩 Bosch CO2145 4 1 Cobalt Drill: Enhance Precision and Durability for DIY Projects by Jimmy Bores

This works much better for punching holes in stainless steel and titanium than an HSS drill bit. I worked slowly to avoid heating the material too much with a TiN coated HSS bit but it didn't work. Use this cobalt with a small amount of cutting fluid and it will cut through the material very quickly.