Features:<br> 1.Professional wood drill bit, suitable for construction, installation, renovation, decoration industry, etc.<br> 2.The utility model in the hole drilled by the rotary body, while the impact of the use of hammer impact force transmitted to the outer,<br> body the material crushing round hole and square head wall, a one-time processing of a square hole, and the dust can be broken slag discharged from the tube.<br> 3.The dimension refers to the length of the square hole drilled by the square hole.<br> 4.The cylinder diameter of the clamped portion is 19mm/0.74inch.<br> Specification:<br> Size:1/4inch(6.4mm), 5/16inch(8mm), 3/8inch(9.5mm), 1/2inch(12.7mm)<br> Material: High-speed steel<br> DIY Supplies: Woodworking<br> Use: Wood Drilling / Punching<br> Package Content:<br> 1 Pcs 1/4 Inch Twist Drill<br> 1 Pcs 5/16 Inch Twist Drill<br> 1 Pcs 3/8 Inch Twist Drill<br> 1 Pcs 1/2 Inch Twist Drill<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin