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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 3400M-15 3/8 Sq. Dr. Socket 15mm 6 point Length 28mm

Ko-ken 3400M-15 3/8 Sq. Dr. Socket 15mm 6 point Length 28mm

SKU: KK-3400M-15
MPN: 3400M-15

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Ko-ken 3400M-16 3/8 Sq. Dr. Socket 16mm 6 point Length 28mm

Ko-ken 3400M-16 3/8 Sq. Dr. Socket 16mm 6 point Length 28mm

SKU: KK-3400M-16
MPN: 3400M-16

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Ko-ken 3400M-17 3/8 Sq. Dr. Socket 17mm 6 point Length 29mm

Ko-ken 3400M-17 3/8 Sq. Dr. Socket 17mm 6 point Length 29mm

SKU: KK-3400M-17
MPN: 3400M-17

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Ko-ken 3400M-18 3/8 Sq. Dr. Socket 18mm 6 point Length 30mm

Ko-ken 3400M-18 3/8 Sq. Dr. Socket 18mm 6 point Length 30mm

SKU: KK-3400M-18
MPN: 3400M-18

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Ko-ken 3400M-19 3/8 Sq. Dr. Socket 19mm 6 point Length 30mm

Ko-ken 3400M-19 3/8 Sq. Dr. Socket 19mm 6 point Length 30mm

SKU: KK-3400M-19
MPN: 3400M-19

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Ko-ken 3400M-20 3/8 Sq. Dr. Socket 20mm 6 point Length 31mm

Ko-ken 3400M-20 3/8 Sq. Dr. Socket 20mm 6 point Length 31mm

SKU: KK-3400M-20
MPN: 3400M-20

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Ko-ken 3400M-21 3/8 Sq. Dr. Socket 21mm 6 point Length 32mm

Ko-ken 3400M-21 3/8 Sq. Dr. Socket 21mm 6 point Length 32mm

SKU: KK-3400M-21
MPN: 3400M-21

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Ko-ken 3400M-22 3/8 Sq. Dr. Socket 22mm 6 point Length 32mm

Ko-ken 3400M-22 3/8 Sq. Dr. Socket 22mm 6 point Length 32mm

SKU: KK-3400M-22
MPN: 3400M-22

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Ko-ken 3400M-23 3/8 Sq. Dr. Socket 23mm 6 point Length 33mm

Ko-ken 3400M-23 3/8 Sq. Dr. Socket 23mm 6 point Length 33mm

SKU: KK-3400M-23
MPN: 3400M-23

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Ko-ken 3400M-24 3/8 Sq. Dr. Socket 24mm 6 point Length 34mm

Ko-ken 3400M-24 3/8 Sq. Dr. Socket 24mm 6 point Length 34mm

SKU: KK-3400M-24
MPN: 3400M-24

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Ko-ken 3400M-25 3/8 Sq. Dr. Socket 25mm 6 point Length 34mm

Ko-ken 3400M-25 3/8 Sq. Dr. Socket 25mm 6 point Length 34mm

SKU: KK-3400M-25
MPN: 3400M-25

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Ko-ken 3400M-26 3/8 Sq. Dr. Socket 26mm 6 point Length 35mm

Ko-ken 3400M-26 3/8 Sq. Dr. Socket 26mm 6 point Length 35mm

SKU: KK-3400M-26
MPN: 3400M-26

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

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

SKU: KK-3400M-5
MPN: 3400M-5

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Ko-ken 3400M-5.5 3/8 Sq. Dr. Socket 5.5mm 6 point Length 26mm

Ko-ken 3400M-5.5 3/8 Sq. Dr. Socket 5.5mm 6 point Length 26mm

SKU: KK-3400M-5.5
MPN: 3400M-5.5

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

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

SKU: KK-3400M-6
MPN: 3400M-6

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

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

SKU: KK-3400M-7
MPN: 3400M-7

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

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

SKU: KK-3400M-8
MPN: 3400M-8

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

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

SKU: KK-3400M-9
MPN: 3400M-9

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Ko-ken 3400M.24-27 3/8 Sq. Dr. Socket 27mm 6 point Length 24mm

Ko-ken 3400M.24-27 3/8 Sq. Dr. Socket 27mm 6 point Length 24mm

SKU: KK-3400M.24-27
MPN: 3400M.24-27

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Ko-ken 3400M.24-30 3/8 Sq. Dr. Socket 30mm 6 point Length 24mm

Ko-ken 3400M.24-30 3/8 Sq. Dr. Socket 30mm 6 point Length 24mm

SKU: KK-3400M.24-30
MPN: 3400M.24-30

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Ko-ken 3400M.24-32 3/8 Sq. Dr. Socket 32mm 6 point Length 24mm

Ko-ken 3400M.24-32 3/8 Sq. Dr. Socket 32mm 6 point Length 24mm

SKU: KK-3400M.24-32
MPN: 3400M.24-32

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Ko-ken 3400M.24-36 3/8 Sq. Dr. Socket 36mm 6 point Length 24mm

Ko-ken 3400M.24-36 3/8 Sq. Dr. Socket 36mm 6 point Length 24mm

SKU: KK-3400M.24-36
MPN: 3400M.24-36

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Ko-ken 3400W-1/2 3/8 Sq. Dr. Socket Whitworth 1/2 6 point Length 33mm

Ko-ken 3400W-1/2 3/8 Sq. Dr. Socket Whitworth 1/2 6 point Length 33mm

SKU: KK-3400W-1/2
MPN: 3400W-1/2

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Ko-ken 3400W-1/4 3/8 Sq. Dr. Socket Whitworth 1/4 6 point Length 26mm

Ko-ken 3400W-1/4 3/8 Sq. Dr. Socket Whitworth 1/4 6 point Length 26mm

SKU: KK-3400W-1/4
MPN: 3400W-1/4

Save $1.72