Material High carbon steel, high quality material to avoid damage during use. General Use Designed for use with impacts, these extensions, adapters and reducers feature spring-loaded detent balls to securely engage the Jacking convenience no matter what tool you use. Ideal for DIY, household and most general repairs, not industrial work. A great tool addition to any toolbox set. High QualityThe extension adapters are made from heat treated chrome vanadium steel with a black oxide coating, and the adapters and reducers are made from high strength, premium chrome moly steel with a manganese finish -Phosphate coating to ensure rust and corrosion resistance for a lifetime of use. Widely usedSuitable for quick-change 1/4" chuck systems or directly into drill chucks. Any cordless drill that examines a power screwdriver. Handy for quickly driving nuts, bolts and fasteners etc. Spring loaded ball bearing on head holds sockets securely.