Features: 1.Excellent material selection, precision heat treatment of the whole, high hardness and impact resistance. 2.Forged with Ming molybdenum steel, durable, can withstand large torque, suitable for electric and pneumatic tools. 3.Blackened surface, rust-proof and corrosion-resistant for long service life. 4.The internal angle design of the conversion sleeve arc, with bolt hole, strong locking force, not easy to slip, easy to use. 5.Various specifications, can be used in different working environments. 6.With four corners arc square head design, this impact socket converter kit features ball bearing for a secure hold. Specification: Condition: 100% Brand New Item Type: Impact Socket Converter Kit Material: CR-MO Chrome Molybdenum Steel Color: As Pictures Shown Application: Suitable for auto repair factory, 4S shop, CNC machine tool, construction site and most of the scenarios where pneumatic and electric tools are used Size: 1/4 in. (Male) x 3/8 in. (Female) 3/8 in. (Male) x 1/2 in. (Female) 3/4 in. (Male) x 1/2 in. (Female) 3/8 in. (Male) x 1/4 in. (Female) 1/2 in. (Male) x 3/8 in. (Female) 1/2 in. (Male) x 3/4 in. (Female) PackageList: 6Pcs/Set x Impact Socket Converter Note: Red and blue boxes are shipped at random.