Features: <br>1. This saw drill bit is made of special steel, heat treatment, HRC48-50, offers high hardness, lengthened core, and high concentricity. <br>2. Professional drill bit, suitable for construction, installation, renovation, decoration industry, etc. <br>3. It will get double effect by matched use with mortise and tenon machine, the square hole punching needs to use electric drill, hammer & other tools. <br>4. 6 pieces a pack with different slot diameter to meet your needs. <br>5. Great accessory for mortising, chisel, and woodworking. <br> <br> <br>Specifications: <br>Condition: 100% Brand New and High Quality <br>Material: Steel <br>Hardness: HRC 48-50 <br> <br>Color: Silver <br>Quantity: 6Pcs <br>Support Diameter: Approx. 19mm / 0.7inch <br>Corebit Length: Approx. 200mm / 7.8inch <br>Model <br>Slot Diameter <br>Weight <br> <br>001 <br>1/4inch (6.4mm) <br>106g <br> <br>002 <br>5/16inch (8mm) <br>131g <br> <br>003 <br>3/8inch (9.5mm) <br>154g <br> <br>004 <br>1/2inch (12.7mm) <br>195g <br> <br>005 <br>9/16inch (14mm) <br>214g <br> <br>006 <br>5/8inch (16mm) <br>222g <br> <br>Weight: Approx. 1215g <br> <br> <br>Package Included: <br>6 x Saw Drills<br>1、This saw drill bit is made of special steel, heat treatment, HRC48-50, offers high hardness, lengthened core, and high concentricity. <br>2、Professional drill bit, suitable for construction, installation, renovation, decoration industry, etc. <br>3、It will get double effect by matched use with mortise and tenon machine, the square hole punching needs to use electric drill, hammer & other tools. <br>4、6 pieces a pack with different slot diameter to meet your needs. <br>5、Great accessory for mortising, chisel, and woodworking.