Spring steel punches place a 1/4" diameter hole 1/2" from the end of 1" x . 062" thick spring steel material. Built in stop positions material within punch for accurate hole placement. can be placed in a vice or handheld and impact driven using a 3/4" socket (punch spring steel already mounted to race car).Pit Stop USA offers Allstar Performance Spring Steel Punch - Socket Type ALL23117 at low everyday prices. Be sure to check out all of our products from Allstar Performance including Allstar Performance Body Braces and Allstar Performance Spring Steel Punches.