The Blair Equipment Company Rotabroach Cutters are designed for fabricating fast, high quality holes. These cutters are ideal for sheet metal and plate materials up to 1/4” thick. Precision ground cutting teeth around the hole allow the center to “pop” out as a slug, leaving a virtually burr-free hole, the company says. The Rotabroach cutters cut up to three times faster and last up to ten times longer than twist drills or hole saws, according to the company. The cutters are available individually or in a set with sizes from 5/16” to 3/4”. This product is made in the USA.