Drill America 3/32" Carbide Tipped Die Drill Bit - D/ADIE Series for Metalworking & Precision Drilling | High-Speed Steel Cutting Tool for DIY & Professional Use

Expensive but worth every penny. Prior to getting this drill-bit I spent 40 min with another gimmicky "diamond" bits with suction guide etc. sold by DRILAX and had to return it because it broke in half inside the hole. This drill bit went through porcelain tile like a warm butter total time 10 min on 4 holes including drilling out the stuck bit. So in conclusion this product is great and I think it's made in USA.