Koken Socket Inhex 3/8Dr 4mm

The Koken 3012M5204 is a precision InHex socket bit featuring a 3/8" square drive and a 4 mm internal hex output. With a 52 mm overall length and premium Japanese craftsmanship, it ensures secure, full-wall engagement and reliable torque performance. This tool is ideal for recessed fasteners in automotive, industrial, and mechanical applications, delivering consistent durability and accuracy. Applications: *Ideal for driving 4 mm internal hex fasteners in deep or tight access situations. *Suitable for automotive repairs, including engine components and brackets. *Perfect for industrial machinery assembly and maintenance requiring full hex contact. *Great for precision mechanical or electrical work where torque efficiency is important. *Designed for professional environments demanding durable, accurate bit sockets.