[Usage Sizes] - The screw extractor set includes 6 different sizes: 1#/head diameter 2.7 mm/usage range 4–6 mm; 2#/head diameter 3 mm/usage range 6–8 mm; 3#/head diameter 4 mm/usage range 8–11 mm; 4#/head diameter 5 mm/usage range 11–14 mm; 5#/head diameter 8 mm/usage range 14–18 mm; 6#/head diameter 10 mm/usage range 18–25 mm. [Quality Material] - The screwdriver set is made of high-quality steel, durable and strong. The products are fully hardened, do not rust easily, and have a long service life. [Usage] - Carefully select the screwdriver that matches the size of the screw to be extracted. Avoid overheating by taking regular breaks during the extraction process. Patience and caution are crucial for this delicate operation. [Complete Set] – The set includes 6 screw extractors, each equipped with a storage box that can be placed according to the model, keeping your screw extractors organized. A complete solution for all your extraction needs. This kit is indispensable in your toolbox to guarantee reliable results every time. [Wide Range of Applications] – This extraction kit can be used to extract all types of damaged, broken, rusted, cracked, or stuck screws, whether in wood or metal. Perfect for craftsmen, DIY enthusiasts, and professionals, it offers a complete solution.