Koken Socket Deep 3/8Dr 5/16`

The Koken 3305A10 is a professional-grade deep-length, 12-point socket featuring a 3/8" square drive and a 5/16" hex opening. Made in Japan, this precision tool offers full-contact engagement and robust torque delivery. With a 55 mm body length, it’s ideal for accessing recessed fasteners in automotive, industrial, and maintenance applications. Applications: *Reaching recessed 5/16" hex fasteners in automotive engines, transmissions, and machinery assemblies. *Industrial equipment servicing where standard sockets cannot access deep-set bolts. *Maintenance and assembly tasks demanding high precision to prevent fastener rounding. *General-purpose usage requiring deep sockets and full-contact surfaces for efficient torque transfer. *Anywhere the Flat Drive design helps extend fastener life and tool longevity.