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KK Hand Tools

Ko-Ken hand tools include professional-grade tools and accessories used for assembly, maintenance, and repair in automotive, industrial, and MRO environments (application dependent). Technicians and maintenance teams typically choose these tools for consistent fit on fasteners, durability under daily use, and better access in tight spaces. Because “hand tools” covers many categories, selecting the right item is mainly about matching the tool type and specifications to your fastener sizes, drive system, and working conditions (per listing).


Explore our full range of Ko-Ken hand tools, including:
Standard and deep sockets (metric and SAE)
Ratchets and breaker bars for high-torque applications
Extension bars for hard-to-reach fasteners
Specialty tools and adaptors for unique jobs

Ko-ken 3400A-15/16 3/8 Sq. Dr. Socket 15/16 6 point Length 34mm

Ko-ken 3400A-15/16 3/8 Sq. Dr. Socket 15/16 6 point Length 34mm

SKU: KK-3400A-15/16
MPN: 3400A-15/16

Save $2.25
Ko-ken 3400A-19/32 3/8 Sq. Dr. Socket 19/32 6 point Length 28mm

Ko-ken 3400A-19/32 3/8 Sq. Dr. Socket 19/32 6 point Length 28mm

SKU: KK-3400A-19/32
MPN: 3400A-19/32

Save $1.61
Ko-ken 3400A-25/32 3/8 Sq. Dr. Socket 25/32 6 point Length 31mm

Ko-ken 3400A-25/32 3/8 Sq. Dr. Socket 25/32 6 point Length 31mm

SKU: KK-3400A-25/32
MPN: 3400A-25/32

Save $2.05
Ko-ken 3400A-3/16 3/8 Sq. Dr. Socket 3/16 6 point Length 26mm

Ko-ken 3400A-3/16 3/8 Sq. Dr. Socket 3/16 6 point Length 26mm

SKU: KK-3400A-3/16
MPN: 3400A-3/16

Save $1.20
Ko-ken 3400A-3/4 3/8 Sq. Dr. Socket 3/4 6 point Length 30mm

Ko-ken 3400A-3/4 3/8 Sq. Dr. Socket 3/4 6 point Length 30mm

SKU: KK-3400A-3/4
MPN: 3400A-3/4

Save $1.66
Ko-ken 3400A-3/8 3/8 Sq. Dr. Socket 3/8 6 point Length 26mm

Ko-ken 3400A-3/8 3/8 Sq. Dr. Socket 3/8 6 point Length 26mm

SKU: KK-3400A-3/8
MPN: 3400A-3/8

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Ko-ken 3400A-5/16 3/8 Sq. Dr. Socket 5/16 6 point Length 26mm

Ko-ken 3400A-5/16 3/8 Sq. Dr. Socket 5/16 6 point Length 26mm

SKU: KK-3400A-5/16
MPN: 3400A-5/16

Save $1.20
Ko-ken 3400A-5/8 3/8 Sq. Dr. Socket 5/8 6 point Length 28mm

Ko-ken 3400A-5/8 3/8 Sq. Dr. Socket 5/8 6 point Length 28mm

SKU: KK-3400A-5/8
MPN: 3400A-5/8

Save $1.61
Ko-ken 3400A-7/16 3/8 Sq. Dr. Socket 7/16 6 point Length 26mm

Ko-ken 3400A-7/16 3/8 Sq. Dr. Socket 7/16 6 point Length 26mm

SKU: KK-3400A-7/16
MPN: 3400A-7/16

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Ko-ken 3400A-7/8 3/8 Sq. Dr. Socket 7/8 6 point Length 32mm

Ko-ken 3400A-7/8 3/8 Sq. Dr. Socket 7/8 6 point Length 32mm

SKU: KK-3400A-7/8
MPN: 3400A-7/8

Save $2.14
Ko-ken 3400A-9/16 3/8 Sq. Dr. Socket 9/16 6 point Length 27mm

Ko-ken 3400A-9/16 3/8 Sq. Dr. Socket 9/16 6 point Length 27mm

SKU: KK-3400A-9/16
MPN: 3400A-9/16

Save $1.50
Ko-ken 3400A-9/32 3/8 Sq. Dr. Socket 9/32 6 point Length 26mm

Ko-ken 3400A-9/32 3/8 Sq. Dr. Socket 9/32 6 point Length 26mm

SKU: KK-3400A-9/32
MPN: 3400A-9/32

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Ko-ken 3400LH-10S 3/8 Sq. Dr. Socket 10S Length 26mm

Ko-ken 3400LH-10S 3/8 Sq. Dr. Socket 10S Length 26mm

SKU: KK-3400LH-10S
MPN: 3400LH-10S

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Ko-ken 3400LH-12S 3/8 Sq. Dr. Socket 12S Length 28mm

Ko-ken 3400LH-12S 3/8 Sq. Dr. Socket 12S Length 28mm

SKU: KK-3400LH-12S
MPN: 3400LH-12S

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Ko-ken 3400LH-14S 3/8 Sq. Dr. Socket 14S Length 30mm

Ko-ken 3400LH-14S 3/8 Sq. Dr. Socket 14S Length 30mm

SKU: KK-3400LH-14S
MPN: 3400LH-14S

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Ko-ken 3400LH-16S 3/8 Sq. Dr. Socket 16S Length 32mm

Ko-ken 3400LH-16S 3/8 Sq. Dr. Socket 16S Length 32mm

SKU: KK-3400LH-16S
MPN: 3400LH-16S

Save $2.56
Ko-ken 3400LH-5S 3/8 Sq. Dr. Socket 5S Length 26mm

Ko-ken 3400LH-5S 3/8 Sq. Dr. Socket 5S Length 26mm

SKU: KK-3400LH-5S
MPN: 3400LH-5S

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Ko-ken 3400LH-6S 3/8 Sq. Dr. Socket 6S Length 26mm

Ko-ken 3400LH-6S 3/8 Sq. Dr. Socket 6S Length 26mm

SKU: KK-3400LH-6S
MPN: 3400LH-6S

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Ko-ken 3400LH-8S 3/8 Sq. Dr. Socket 8S Length 26mm

Ko-ken 3400LH-8S 3/8 Sq. Dr. Socket 8S Length 26mm

SKU: KK-3400LH-8S
MPN: 3400LH-8S

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Ko-ken 3400M-10 3/8 Sq. Dr. Socket 10mm 6 point Length 26mm

Ko-ken 3400M-10 3/8 Sq. Dr. Socket 10mm 6 point Length 26mm

SKU: KK-3400M-10
MPN: 3400M-10

Save $1.09
Ko-ken 3400M-11 3/8 Sq. Dr. Socket 11mm 6 point Length 26mm

Ko-ken 3400M-11 3/8 Sq. Dr. Socket 11mm 6 point Length 26mm

SKU: KK-3400M-11
MPN: 3400M-11

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Ko-ken 3400M-12 3/8 Sq. Dr. Socket 12mm 6 point Length 26mm

Ko-ken 3400M-12 3/8 Sq. Dr. Socket 12mm 6 point Length 26mm

SKU: KK-3400M-12
MPN: 3400M-12

Save $1.09
Ko-ken 3400M-13 3/8 Sq. Dr. Socket 13mm 6 point Length 26mm

Ko-ken 3400M-13 3/8 Sq. Dr. Socket 13mm 6 point Length 26mm

SKU: KK-3400M-13
MPN: 3400M-13

Save $1.32
Ko-ken 3400M-14 3/8 Sq. Dr. Socket 14mm 6 point Length 27mm

Ko-ken 3400M-14 3/8 Sq. Dr. Socket 14mm 6 point Length 27mm

SKU: KK-3400M-14
MPN: 3400M-14

Save $1.36