Perfect size: 3.8 cm, inner diameter: 2.5 cm, total length: 26.2 cm. Suitable for large wooden posts to achieve higher torque and easier drilling. Super sharp: Professionally ground spirals for precise and clean hole drilling. Self-tapping pilot screw design allows for easy manual use with wood drill bits. Made of high-quality oxidized hardened steel for enhanced strength and durability. Ideal for outdoor enthusiasts, bushcrafters, carpenters, and DIY users. Multi-functional use in wood projects such as fish traps, chairs, mallets, ladders, maple syrup taps, and survival shelters. Compact and reliable camping and survival tool, suitable for inclusion in jungle or outdoor gear. This scotch eyelet bolt is made of durable steel for long-lasting performance.