This is a ratchet socket adapter kit designed for screwdriver or electric screwdriver handle tools to convert the size mounted on a original hexagonal to a square head size metric drill bit. Can be used in the automotive industry, home repair, manufacturing, and construction. Features: Construction Tools: Suitable for screwdriver or electric screwdriver handle tools, can be installed on the original hexagonal to be converted to square head. Socket Adapter Set: 4 pieces vanadium steel socket adapter and reducer set are designed for impact use, high hardness, plated finish ensures performance. Socket Adapter Reducer: For all four holes slot, sleeve mutual conversion, adjustable joints. Ratchet Wrench: Allows you to match drive sizes for your sockets, ratchet handles, extension bars and other accessories. Impact Driver Adapter: Great for for repair, car modification, wrench socket transformation. Applicable to automotive industry, household maintenance, manufacturing industry, construction. Specifications: Material: Chromium-vanadium steel Color: Silver Item Size: 3/4" to 1/2" - (3/4"(19mm) square hole to 1/2"(12.5mm) square head), Height: 56mm 1/2" to 3/4" - (1/2"(12.5mm) square hole to 3/4"(19mm) square head), Height: 48mm 3/8" to 1/4" - (3/8"(10mm) square hole to 1/4"(6.35mm) square head), Height: 27mm 1/4" to 3/8" - (1/4"(6.35mm) square hole to 3/8"(10mm) square head), Height: 26mm 1/2" to 3/8" - (1/2"(12.5mm) square hole to 3/8"(10mm) square head), Height: 38mm 3/8" to 1/2" - (3/8"(10mm) square hole to 1/2"(12.5mm) square head), Height: 36mm Package Weight: 610g / 1.34lb Package Size: 15.2 * 9 * 5cm / 5.98 * 3.54 * 1.97in Package List: 6 * Socket Adapter Converter 1 * Storage Case