Bi-Metal Hole Saw Kit for 1/2" - 2" Conduit Sizes. Several electrician's kits available providing an assortment of the most commonly used Greenlee variable pitch hole saw sizes and arbors. High-impact, rugged plastic carrying case. Each kit includes three hole saw stops. Bi-Metal Hole Saw Kit for 1/2" - 2" Conduit Sizes. Several electrician's kits available providing an assortment of the most commonly used Greenlee variable pitch hole saw sizes and arbors. High-impact, rugged plastic carrying case. Each kit includes three hole saw stops.