Feature●Precision ground, heat treated tools made from M2 HSS that can easily cut thru the stock rather than ripping, tearing, and pushing thru as do typical hole saws●Can produce holes 3 times faster and cleaner than hole saws in sheet metal and have a dramatically extend tool life●This kit contains 7/8, 1-1/8, 1-3/8, 1-3/4, 2, & 2-1/2" Cutters, Arbor & Extra Pilot●Ideal for aftermarket installations, custom fabrication, gauge installation, and modification of trailers●Patented quad-lead thread system, making cutter changes quicker than over beforeDescription Value-priced, high quality tools - leading the market by ensuring that products are rugged, reliable and reasonably priced.