Characteristic: 1. The saw drill bit is made of special heat treated steel HRC48-50 and provides high hardness, elongated core and high concentricity. 2. Professional drill bit, suitable for construction, installation, renovation, decoration industry, etc. 3. It will achieve a double effect thanks to the matched use with the mortise and spigot machine, when cutting square holes, use an electric drill, hammer and other tools. 4. 6pcs per pack with different slot diameter to meet your needs. 5. Great addition do chiseling, chiseling and woodworking. Technical data: Material: stal Hardness: HRC 48-50 Color: Silver Quantity: 6 pcs Support diameter: ok. 19 mm / 0,7 inch Core length: ok. 200 mm / 7,8 inch Model Slot Diameter Weight 0011/4 inch (6.4 mm) 106 g 0025/16 inches (8 mm) 131 g 0033/8 inch (9.5 mm) 154 g 0041/2 inch (12.7 mm) 195 g 0059/16 inches (14 mm) 214 g 0065/8 inch (16 mm) 222 g Weight: ok. 1215g The package includes: 6 x saw drill bits