Carolus Socket 1/4" Square Drive 4 mm Slotted Bit

This Carolus 1/4" square drive socket is designed to hold 4 mm slotted screwdriver bits securely during installation and removal work. Built to DIN 3120 and ISO 1174 standards, it features a ball retention groove to prevent bit slippage during operation, making it ideal for automotive mechanics, panel builders, and electrical contractors working with precision fasteners.