Feature: 1,Sharp Design: professionally grind each spiral with self-tapping pilot design, sharp and perfect, very convenient for manual drilling. 2,Durable Material: It is made of high-quality hardened oxidized steel material, which is sturdy and durable. 3,Perfect Size: Suitable for larger wooden rods to obtain greater torque and easier drilling! 4,Camping Survival Tool: Throw it into your jungle craft backpack as the finest jungle craft tool, instead of other manual primitive tools and jungle craft survival tools! 5,Multiple Uses: used in cork/green wood projects such as fish traps, chairs, mallets, ladders, maple syrup taps, and survival shelters. Material: carbon steel Note: The size in the picture is manual measurement, there will be a little error, please refer to the actual product.Due to the lighting effects and shooting angles, there is color difference in the product, please understand.