Irwin 88816 Speedbor Blue-Groove Standard Length Woodboring Spade Bit - 1" x 6" – Carded Blue-Groove point and cutting edge for faster chip removal - 4x faster than standard spade bits Double cutting spurs scribe the outside of the hole reducing breakout 10% larger shank for added durability Grooved hex shank prevents slipping in drill chuck or bit extension Fits all standard quick change chucks Diameter: 1" Shank Size: 1/4" Quick-Change Length: 6" UPC: 0 24721 20054 9 Wt. (lbs.): 0.125 Product Brochure Reference Guide Bit Selection Guide Package: 1 Drill Bit/Card Case Quantity: 6 Cards/Case Sold as Each. Price given per Each. WARNING: Always read and follow the operating and safety instructions in the power tool owner's manual and the instructions for use of the accessory. Always wear safety goggles to protect your eyes, gloves to protect your hands, and wear other appropriate safety items for protection. Do not drill near live electrical circuits. Do not use a side-to-side movement when drilling. Make sure the backside of the material being drilled is clear of wires, cables, pipes, and other objects that might cause hazards.