Proto Socket Extension, Locking, Yes Impact Rated, Measurement System: Imperial, Square Drive, 1/2 in Drive, 5 in Overall Length, Patented Locking, Alloy Steel, Polished Chrome

ITEM FEATURES:

• Solid 1-piece design helps prevent the locking components from becoming loose or disengaged
• Patented locking feature locks sockets to the extension with exceptional force
• Knurled shank provides a slip-resistant grip when hand turning the extension