Features: This 13 piece woodworking drill bit set features a double gear drive mechanism and 45# steel construction for smooth operations, reduced jamming, and enhanced durability in demanding drilling tasks. The ergonomic hollow ABS handle offer convenient bit storage, while the adjustable silicon solvent cast chucks accommodates various bit sizes (1/4" 13mm) for versatile woodworking applications. Ideal for professional carpenters, DIYer enthusiasts, and homeowners seeking reliabled precise tools for furniture assembly, home repairs, and craft projects. Perfect for drilling through wood, plastic, and soft metals in workshops, construction site, or household maintenance scenarios requiring controlled manual operations. Engineered with gear teeth and corrosions resistant alloy components, this multi purpose drilling set ensures long lasting performances across woodworking projects and renovation challenges. Specifications: Component:aluminium alloy Clamping ranging: 0.6-6mm Net weight of product: 614g (with accessories) Product packaging: carton pack Product Specifications: 1/4 inch Package Includes: 1 Set Woodworking Drill Bit note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.