Bullet Points: 1High-quality Material: The pneumatic sleeve adapter is made of high-quality chrome vanadium steel, which is durable and can withstand large torques. It is suitable for electric and high-hardness and impact-resistant pneumatic tools. 2Small and Exquisite: This pneumatic sleeve adapter is small and exquisite, easy to carry. It has anti-explosion, anti-skid, and anti-magnetic functions. Excellent workmanship. Perfect compatibility, excellent quality and stable performance. 3High Hardness: High strength, high hardness, high rigidity. No easy to damage, no easy to bend. The surface is black phosphated, and the whole is quenched and tempered to ensure the best durability and service life. 4Professional Maintenance Tool: The pneumatic sleeve adapter has 6 specifications to choose from. You can choose according to different situations. With good impact resistance and large torque, it is a professional and safe maintenance tool. 5Stable and Reliable: This pneumatic sleeve adapter is professionally produced. After many quality and safety inspections, the performance is stable and reliable. The workmanship is excellent, and the quality is excellent, which will bring you more convenience. Is your best choice. Features: 1. 100% brand new and easy to use. The arc inner corner of the conversion sleeve is designed with bolt holes, which has strong locking force and is not easy to slip. 2. Adopting a four-corner arc square head design, this impact sleeve converter kit has a ball bearing to ensure a firm fixation. 3.The sleeve adapter is made of chromium-vanadium alloy steel, forged as a whole, and the surface is black phosphating treatment. and the whole is quenched. Specification: Name: Sleeve Adapter Surface treatment: black phosphating Material: 42CR-MO chrome molybdenum steel Application: Suitable for use in auto repair shops, 4S shops, CNC machine tools, construction sites and most pneumatic scenes and power tools 3/8 hole 1/4 head: about 18g 1/4 hole 3/8 head: about 18g 3/8 hole 1/2 head: about 43g 1/2 hole 3/8 head:about 47g 3/4 hole 2/1 head:about 253g 1/2 hole 3/4 head: about 136g Packing List: Sleeve*6 Toolbox*1 Note: Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size.