| Hole saws Hollow electric hammer drill is composed of a guided drill and a connecting rod. It can be fitted to various electric hammers as a boring tool for processing large holes. It is a novel tool for installation and decoration trades. Metal hole saws: RY1311& 1312 RY1313 hex shank: 3/8” Chuck size: 3/8” Thread size: 1/2”—20UNF Fit hole saws: 9/16” to 1-3/16” diameter RY1314 hex shank: 7/16” Chuck size: 1/2” Thread size: 5/8”—20UNF Fit hole saws: 1-3/4” to 3” diameter RY1315 hex shank: 7/16” Chuck size: 1/2” Thread size: 1/2”—20UNF Fit hole saws: 9/16” to 1-3/16” diameter |