Inquiry (采购产品): drilling tempered steel What can be used to drill a 3/8" hole in 1/2" thick tempered steel? Thank you **** Hidden Message ***** Bernie Steinharter MD 21230 USA Company: Caplan Bros. Glass Co Title: ast. v.p. E-mail: bsteinharter@caplanglass.com **** Hidden Message ***** bsteinharter@caplanglass.com