TEKTON 47821 1/2 in. Drive (M) by 3/8 in.  (F) Impact Adapter, Cr-V
The TEKTON 47821 Impact Adapter is constructed of drop forged, heat treated chrome vanadium steel with a durable black oxide finish to resist corrosion. The hole locks onto ratchet while the ball bearing locks on the socket. This item meets or exceeds ANSI standards. And, don't worry, it's backed by the TEKTON lifetime replacement guarantee. So, go ahead, Take It On.