KK Accessories

Discover the Ko-Ken collection at Freer Tool & Supply—your destination for premium Japanese hand tools and sockets renowned for precision, durability, and professional performance. Our selection includes Ko-Ken’s high-quality impact sockets, ratchets, extensions, and specialty tools, all engineered for demanding automotive, industrial, and maintenance applications. Whether you’re a technician, mechanic, or industry professional, Ko-Ken tools deliver the reliability and accuracy you need for every job.


Ko-ken 12140-5/16 1/4 Sq. Dr. Adaptor  5/16 For 5/16H Bit Length 25mm

Ko-ken 12140-5/16 1/4 Sq. Dr. Adaptor 5/16 For 5/16H Bit Length 25mm

SKU: KK-12140-5/16
MPN: 12140-5/16

Sale price $17.02 List price $21.27
Save $4.25
Ko-ken 12142-F6.3 1/4 Sq. Dr. Bit Holder  1/4 Hex Length 36mm Locking Quick Release

Ko-ken 12142-F6.3 1/4 Sq. Dr. Bit Holder 1/4 Hex Length 36mm Locking Quick Release

SKU: KK-12142-F6.3
MPN: 12142-F6.3

Sale price $50.13 List price $62.66
Save $12.53
Ko-ken 13139-1/4 3/8 Sq. Dr. Adaptor  1/4 For 1/4H Bit Length 30mm

Ko-ken 13139-1/4 3/8 Sq. Dr. Adaptor 1/4 For 1/4H Bit Length 30mm

SKU: KK-13139-1/4
MPN: 13139-1/4

Sale price $18.62 List price $23.27
Save $4.65
Ko-ken 13140-5/16 3/8 Sq. Dr. Adaptor  5/16 For 5/16H Bit Length 30mm

Ko-ken 13140-5/16 3/8 Sq. Dr. Adaptor 5/16 For 5/16H Bit Length 30mm

SKU: KK-13140-5/16
MPN: 13140-5/16

Sale price $17.61 List price $22.01
Save $4.40