【Wood Drill Bit Size】Total length: 16cm, drill bit length: 11cm, drill bit diameter: 42mm. For 1/2 round shank and 1/2 hex shank drill bits. [High-quality material] The firewood drill bit is made of high-carbon steel material, which is impact-resistant, wear-resistant, high hardness, toughness and durability for long service life. 【Advantage】Anti-slip groove design for long working hours, making your work comfortable. 【Efficient work】Efficient wood cutter for cutting and opening wood, quickly separate wood and increase productivity. Not recommended for Nordic woods or large diameter hardwoods. [How to use] Just install the drill bit into the electric drill and drill the wood, and the firewood will be easily sprayed with its optimal hardness and strength. No moving blade and don't worry about your kids swinging an axe. Product Description: 1. Made of high quality high carbon steel 2. It can open all kinds of soft and hard woods. 3. Quickly separate logs and increase productivity. 4.