DeWalt Bi-Metal Electrician's Hole Saw KitDeWalt Bi Metal Electrician's Hole Saw Kit Brand Name: DeWalt Length: 1. 49 in. Product Type: Electrician's Hole Saw Kit Shank Diameter: 1 4 in. Number in Package: 9 pc. Diameter: Assorted in. Material: Bi Metal Quick Change System: Yes Arbor Included: Yes Usage: Electricians Double tooth design strengthens each tooth for longer life and improved durability Sharper tooth geometry cuts material faster for faster drilling Thick, hardened backing plates