The straight lip drill bit is a variation of the twist drill bit optimized for drilling in wood. Conventional twist drill bits tend to wander when laid down on a flat workpiece. In wood, the straight lip drill bit is a solution: the center of the drill bit does not receive the straight chisel of the twist drill bit, but a spur with a sharp point and sharp corners for cutting wood. The sharp point of the spur simply digs into the soft wood to keep the drill bit aligned. Specifications: Drill bit material: HSS4241; Length: 158mm (6.22"); Cutting edge length: 65mm (2.56"); Point length: 12mm (0.47"); Hex shank length: 25mm (0.98"); Hex shank diameter: 6.35mm(1/4"); Stop OD: 19mm (0.75"); Stop ID: 9.5mm (3/8"); Package Includes: 1 x Drill Bit 1 x Drill Stop 1 x Hex Wrench 1. This straight point drill bit is made of high speed steel for good hardness and durability for woodworking 2. The drill bit has a 1/4 inch hex shape shank which could fit many electric drill chucks 3. The pointed tip design could prevent slipping and simply push into the soft wood to keep the drill bit in line. 4. This set comes with an adjustable round drill stop which can be used to adjust the drilling depth 5. There is a small L shape hex wrench so you can easily use it to adjust the drill stops.