3、Positioning is accurate, let the drill bit and the wood bite before the flat drill touches the wood, the drilled hole is also very round. The flat blade design uses sharp blades to ensure smooth and clean holes, can scribe the outside of the hole, ensure the plate is evenly stressed and avoid breakout, also for efficient and smooth chip removal QUICK CHANGE: 0.2 inch shank fits into all power tools more easily and securely, specially for locking into quick change chuck. 2、The drill bit adopts cutting thorn design, which greatly reduces the occurrence of hole wall chipping. 5、Strict quality control, high safety factor, can be used with peace of mind. Buy Agatige 4PCS Spade Drill Bit Set, Paddle Flat Bits 20mm Hole Opening Hole Cutter High Carbon Steel Hex Shank Drill Bit Set Woodworking Drilling Tool Shank Length 28mm, Shank Dia 6. at Paddle Bits Silver Spade Drill Bit Paddle Flat Bits 4pcs Flat Wood Drill Bits Hole Opening20mm / 0.8in Hex Paddle Flat Bits With Hex Shank For DIY Wooden Craft Hex Shank Spade Drill Bits Material: High carbon steel Hole Opening: Approx. 20mm / 0.8in Shank Length: Approx. 28mm / 1.1in Shank Diameter: Approx. 6.2mm / 0.2in HIGH CARBON STEEL: Spade drill bit is made of high carbon steel material, which is strong and durablity. CUTTING THORN DESIGN: Spade drill bits designed with double-cutting spurs, greatly reduces the occurrence of chipping on the hole wall. Specification Item Type: Flat Wood Drill Bits With hex shank, easy to clamp, non-slip, will not fall off during work. Shank length approx. 28mm / 1.1in,shank diameter approx. 6.2mm / 0.2in,drill Bit Length: Approx. 45mm / 1.8in Features 1、Combining high hardness and durability, strong and durable, has a long service life.