This is a Starrett 1 1/8" (29mm) "Special Size" Carbide Grit Hole Saw. This Hole Saw is Brand New in a box. Made in the USA. Features & Benefits: *Special Size 1-5/8" Depth. *Grit Edge Carbide *Made in the USA *Makes clean and accurate cuts in: Fiberglass, Cast Iron, Ceramic Tile, Masonary Materials & Similar Tough and Abrasive Materaials. Application Information: *Create Holes For Pipe and Tubing Installations, Door Lock Installations, Electrical Conduit, Hoses, and Antennas. *Ideal for Plumbing, Construction, Aircraft, Electrical, Maintenance, and Automotive Applications. This Hole Saw to be Used With a 1/2 - 20 Thread Arbor. They Are Located in the Arbors & Pilots Sections of Our Store.