This Blue Spot adaptor set contains 4 adaptors, each manufactured from chrome vanadium, hardened and tempered for durability. They have spring loaded ball bearings to hold sockets securely.

The set contains the following adaptors:
1/4in Female > 3/8in Male
3/8in Female > 1/4in Male
1/2in Male > 3/8in Female
1/2in Female > 3/8in Male