Wood Drill Bit Size- Total length: 16cm, drill bit length: 11cm, drill bit diameter: 42mm. For drills with 1/2 round shank and 1/2 hex shank. High Performance Material- High quality carbon steel wood drill bit. Exceptional resistance to shock and wear. Long service life, high hardness, super strength. Efficient Work - Efficient wood cutter for cutting and opening wood, quickly separating wood and increasing productivity. Not recommended for Nordic woods or large diameter hardwoods. Widely Used- Split hard oak, hickory, walnut, sycamore, widely used for home, outdoor, camping, farm. Whether it's family, camping or farm, can be easily used. Easy to Use - Simply insert the drill bit and drill into the wood. The firewood is then slightly dirty. No moving blades and you don't have to worry about your kids swinging an axe.