[ and Recognizable Marking]:Our socket adapter set is made of black manganese phosphate coating, which has excellent resistance and rust resistance so that you can use and preserve it for a long time. [Safe and Secure]:The spring-loaded ball detent can lock your socket in place and secure the through-hole to prevent it from falling, providing excellent stability and execution. A through hole on end securely locks the adapter to . [High Quality Chrome Steel]:The adapter set is made of heat-treated steel material, which has high hardness and durability and can withstand the test of different jobs. [Perfect Complete Set]: The set includes: Reducers: 1 inch F to 3/4 inch M, 3/4 inch F to 1/2 inch M, 1/2 inch F to 3/8 inch M, 3/8 inch F to 1/4 inch M; adapters: 1/4 inch F to 3/8 inch M, 3/8 inch F to 1/2 inch M, 1/2 inch F to 3/4 inch M, 3/4 inch F to 1 inch M. [Wide Applicability]:Complete impact drive socket adapter kit, easy conversion and strong compatibility, can meet all your needs. Designed for screwdrivers, wrenches and ratchets. Can be used with pneumatic tools, electric tools or drive tools., Weight: 2.96301280128 pounds, Manufacturer: Kueohse