Durable 8-piece air impact socket adapters by Neiko Tools, manufactured with drop forged chrome molybdenum steel heat treated with a black oxide finish. Allows greater flexibility for all sockets and drive tools. Ball detent securely holds sockets on the coupler. Set includes 3/8"(M)x 1/4"(F), 1/4"(M) x 3/8"(F), 3/8"(M) x 1/2"(F), 1/2"(M) x 3/8"(F), 3/4"(M) x 1"(F), 3/4"(M) x 1/2"(F), 1/2"(M) x 3/4"(F), 1"(M) x 3/4"(F).