Features: Using high-strength stainless steel, it has good corrosions resistance and wear resistance, ensuring excellent performances even after long-term use. Multiple inner hole diameter options: up to 7 inner hole diameters are available (4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm) to flexibly meet the drilling needs of various woodworking and aluminum profile. Precise positioning drilling: The design solves the problems of drill bit offset and shaking, ensuring the accuracy of drilling and greatly improving work efficiency, allowing users to save time and effort. Widely applicable: It can be used in various scenarios such as woodworking punching, layer board support punching, and aluminum profile punching, and is highly practical, making it ideal for woodworking enthusiasts and professionals. Anti slip rolling design: The rolling surfaces enhances friction, effectively preventing slipping, making operations more stable and safe, and improving comfort during use. Specifications: Component: Stainless Steel Thread: M14 Inner Hole Diameter: 4mm/5mm/6mm/7mm/8mm/9mm/10mm Package Includes: 1Piece Drill Guide Bushing note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.