Be prepared for the unexpected with the TEKTON 3/8 in. Drive (F) to 1/2 in. Drive (M) Adapter. This problem solver creates a solution for lost or broken sockets, fills the gaps in incomplete size ranges, and extends the capability of your existing socket system. Made from premium chrome vanadium steel, it is precisely heat treated for superior strength and protected by a durable, corrosion-resistant mirror chrome finish.