This T-hand 3/8 inch to 1/4 inch socket adapter is perfect and convenient for all your project needs. It is designed to fit a 3/8 inch drill for compact and rugged use.
The 3/8 inch grip can always be in the holder, the replaceable parts are the 1/4 inch sockets. It is designed to fit into a 1/4 inch socket, making all hex type screwdriver bits and drills compatible.
It is particularly useful for adapting a hex style screw thread tap, but can be used for other tasks as well. My 3/8 inch socket adapter is 15mm wide.