Carolus 1/4" Socket 4mm – Hex Drive Ball Retention

The Carolus 1/4" Socket is a 4mm hex drive socket manufactured to DIN 3120 (C 6.3) and ISO 1174 standards, featuring a ball retention groove for secure bit or tool engagement. Built for precision and durability, this socket is ideal for automotive work, panel building, and general maintenance tasks requiring reliable fastener turning.