Features: This punch with automatic centering function comes in three sizes: 6mm, 8mm and 10mm, suitable for various drill bits to meet different drilling needs. The fixed end of the locator is 45mm long, which can quickly center the punch to ensure accurates drilling. Material: This tool is made of aluminum alloy with protective anodized surfaces, which is durable and rust-proof and can effectively resist corrosion. Simple and easy to use, you can easily insert the appropriate drill sleeve according to your needs to drill precise holes in the board. Wide range of uses: The self-centering pin clamp is perfect for DIY woodworking enthusiasts, construction workers, woodworkers, engineers and enthusiasts. Equipped with 8 different: Specifications of metal drill bushings, 3-10mm sizes, high hardness, not easy to wear, practical and widely applicable. Easy to Use: Easy to operate and use, it is widely used for accuracy positioning when punching wood for furniture planks, with nice verticality for better splicing of planks. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Material: aluminum alloy