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Ko-Ken

Ko-Ken


Ko-Ken Professional Tools: Premium Industrial Hand Tools

Professional-Grade Ko-Ken Tools from Your Trusted Michigan-Based Distributor

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 United states distributors

High Performance Tools of Convincing Quality.

Founded in 2012 by Jim Chase, Koken USA began sharing in the tool marketplace about an excellent product line of tools that was new to North America. He was so impressed by their quality and engineering that he claimed, "If we can just get them (Koken sockets) into the hands of the consumer, they will never buy anything else."

First with the introduction of Koken's broad line of standard sockets and tools, followed by their offering of custom sockets to meet specific customer requirements, Koken quickly developed a reputation for quality tools and outstanding customer service in North America.

Available Product Lines:
Professional Hand Tools:

Socket Sets
Impact Sockets
Specialty Tools
Industrial Solutions

Ko-ken RS3440T/8 3/8 Sq. Dr. Universal Socket set TORX E6-E20 200mm 8 pieces

Ko-ken RS3440T/8 3/8 Sq. Dr. Universal Socket set TORX E6-E20 200mm 8 pieces

SKU: KK-RS3440T/8
MPN: RS3440T/8

Save $62.53
Ko-ken RS3441M/5 3/8 Sq. Dr. Universal Socket set 8mm-14mm Nut Grip 150mm 5 pieces

Ko-ken RS3441M/5 3/8 Sq. Dr. Universal Socket set 8mm-14mm Nut Grip 150mm 5 pieces

SKU: KK-RS3441M/5
MPN: RS3441M/5

Save $51.09
Ko-ken RS3445W/7 3/8 Sq. Dr. Universal Socket set Whitworth 1/8-1/2 12 point 200mm 7 pieces

Ko-ken RS3445W/7 3/8 Sq. Dr. Universal Socket set Whitworth 1/8-1/2 12 point 200mm 7 pieces

SKU: KK-RS3445W/7
MPN: RS3445W/7

Save $64.73
Ko-ken RS3450M/10 3/8 Sq. Dr. Socket set 10mm-22mm Nut Grip 250mm 10 pieces

Ko-ken RS3450M/10 3/8 Sq. Dr. Socket set 10mm-22mm Nut Grip 250mm 10 pieces

SKU: KK-RS3450M/10
MPN: RS3450M/10

Save $27.48
Ko-ken RS3450M/8 3/8 Sq. Dr. Socket set 8mm-19mm Nut Grip 200mm 8 pieces

Ko-ken RS3450M/8 3/8 Sq. Dr. Socket set 8mm-19mm Nut Grip 200mm 8 pieces

SKU: KK-RS3450M/8
MPN: RS3450M/8

Save $21.19
Ko-ken RS3450MH/6 3/8 Sq. Dr. Socket set 8mm-17mm Nut Grip 150mm 6 pieces

Ko-ken RS3450MH/6 3/8 Sq. Dr. Socket set 8mm-17mm Nut Grip 150mm 6 pieces

SKU: KK-RS3450MH/6
MPN: RS3450MH/6

Save $29.90
Ko-ken RS3X00MZ/12 3/8 Sq. Dr. Socket set 8-19mm 6 point 300mm Z-series 12 pieces

Ko-ken RS3X00MZ/12 3/8 Sq. Dr. Socket set 8-19mm 6 point 300mm Z-series 12 pieces

SKU: KK-RS3X00MZ/12
MPN: RS3X00MZ/12

Save $33.25
Ko-ken RS4010A/10-L60 1/2 Sq. Dr. Bit Socket set 3/16-3/4 Hex 300mm 10 pieces

Ko-ken RS4010A/10-L60 1/2 Sq. Dr. Bit Socket set 3/16-3/4 Hex 300mm 10 pieces

SKU: KK-RS4010A/10-L60
MPN: RS4010A/10-L60

Save $30.74
Ko-ken RS4010M/10-L50 1/2 Sq. Dr. Bit Socket set 4mm-19mm Hex 300mm 10 pieces

Ko-ken RS4010M/10-L50 1/2 Sq. Dr. Bit Socket set 4mm-19mm Hex 300mm 10 pieces

SKU: KK-RS4010M/10-L50
MPN: RS4010M/10-L50

Save $26.02
Ko-ken RS4010M/10-L75 1/2 Sq. Dr. Bit Socket set 4mm-19mm Hex 300mm 10 pieces

Ko-ken RS4010M/10-L75 1/2 Sq. Dr. Bit Socket set 4mm-19mm Hex 300mm 10 pieces

SKU: KK-RS4010M/10-L75
MPN: RS4010M/10-L75

Save $27.38
Ko-ken RS4012A/10-L60 1/2 Sq. Dr. Bit Socket set 3/16-3/4 Hex 300mm 10 pieces

Ko-ken RS4012A/10-L60 1/2 Sq. Dr. Bit Socket set 3/16-3/4 Hex 300mm 10 pieces

SKU: KK-RS4012A/10-L60
MPN: RS4012A/10-L60

Save $31.89
Ko-ken RS4012M/10-L60 1/2 Sq. Dr. Bit Socket set 4mm-19mm Hex 300mm 10 pieces

Ko-ken RS4012M/10-L60 1/2 Sq. Dr. Bit Socket set 4mm-19mm Hex 300mm 10 pieces

SKU: KK-RS4012M/10-L60
MPN: RS4012M/10-L60

Save $28.64
Ko-ken RS4020/6-L60 1/2 Sq. Dr. Bit Socket set XZN M5-M14 Triple Square 150mm 6 pieces

Ko-ken RS4020/6-L60 1/2 Sq. Dr. Bit Socket set XZN M5-M14 Triple Square 150mm 6 pieces

SKU: KK-RS4020/6-L60
MPN: RS4020/6-L60

Save $19.19
Ko-ken RS4025/9-IP 1/2 Sq. Dr. Bit Socket set TORXPLUS 20IP-60IP 250mm 9 pieces

Ko-ken RS4025/9-IP 1/2 Sq. Dr. Bit Socket set TORXPLUS 20IP-60IP 250mm 9 pieces

SKU: KK-RS4025/9-IP
MPN: RS4025/9-IP

Save $31.37
Ko-ken RS4025/9-L60 1/2 Sq. Dr. Bit Socket set TORX T20-T60 250mm 9 pieces

Ko-ken RS4025/9-L60 1/2 Sq. Dr. Bit Socket set TORX T20-T60 250mm 9 pieces

SKU: KK-RS4025/9-L60
MPN: RS4025/9-L60

Save $26.12
Ko-ken RS4027/6-L60 1/2 Sq. Dr. Bit Socket set Ribe-CV M5-M16 200mm 6 pieces

Ko-ken RS4027/6-L60 1/2 Sq. Dr. Bit Socket set Ribe-CV M5-M16 200mm 6 pieces

SKU: KK-RS4027/6-L60
MPN: RS4027/6-L60

Save $25.18
Ko-ken RS4127/6 1/2 Sq. Dr. Nut Twister set 17mm-25.4mm 200mm 6 pieces

Ko-ken RS4127/6 1/2 Sq. Dr. Nut Twister set 17mm-25.4mm 200mm 6 pieces

SKU: KK-RS4127/6
MPN: RS4127/6

Save $55.50
Ko-ken RS4129/5-L37 1/2 Sq. Dr. Bolt Twister set 8mm-16mm 150mm 5 pieces

Ko-ken RS4129/5-L37 1/2 Sq. Dr. Bolt Twister set 8mm-16mm 150mm 5 pieces

SKU: KK-RS4129/5-L37
MPN: RS4129/5-L37

Save $17.73
Ko-ken RS4129/5-L75 1/2 Sq. Dr. Bolt Twister set 8mm-16mm 150mm 5 pieces

Ko-ken RS4129/5-L75 1/2 Sq. Dr. Bolt Twister set 8mm-16mm 150mm 5 pieces

SKU: KK-RS4129/5-L75
MPN: RS4129/5-L75

Save $20.14
Ko-ken RS4300A/10 1/2 Sq. Dr. Socket set 3/8-15/16 6 point 300mm 10 pieces

Ko-ken RS4300A/10 1/2 Sq. Dr. Socket set 3/8-15/16 6 point 300mm 10 pieces

SKU: KK-RS4300A/10
MPN: RS4300A/10

Save $41.96
Ko-ken RS4300M/10 1/2 Sq. Dr. Socket set 10-22mm 6 point 300mm 10 pieces

Ko-ken RS4300M/10 1/2 Sq. Dr. Socket set 10-22mm 6 point 300mm 10 pieces

SKU: KK-RS4300M/10
MPN: RS4300M/10

Save $36.30
Ko-ken RS4305A/10 1/2 Sq. Dr. Socket set 3/8-15/16 12 point 300mm 10 pieces

Ko-ken RS4305A/10 1/2 Sq. Dr. Socket set 3/8-15/16 12 point 300mm 10 pieces

SKU: KK-RS4305A/10
MPN: RS4305A/10

Save $41.96
Ko-ken RS4305M/10 1/2 Sq. Dr. Socket set 10-22mm 12 point 300mm 10 pieces

Ko-ken RS4305M/10 1/2 Sq. Dr. Socket set 10-22mm 12 point 300mm 10 pieces

SKU: KK-RS4305M/10
MPN: RS4305M/10

Save $36.30
Ko-ken RS4310M/10 1/2 Sq. Dr. Socket set 10-22mm Surface 300mm 10 pieces

Ko-ken RS4310M/10 1/2 Sq. Dr. Socket set 10-22mm Surface 300mm 10 pieces

SKU: KK-RS4310M/10
MPN: RS4310M/10

Save $38.08