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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 3400W-7/16 3/8 Sq. Dr. Socket Whitworth 7/16 6 point Length 32mm

Ko-ken 3400W-7/16 3/8 Sq. Dr. Socket Whitworth 7/16 6 point Length 32mm

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

Save $2.41
Ko-ken 3400W-9/16 3/8 Sq. Dr. Socket Whitworth 9/16 6 point Length 35mm

Ko-ken 3400W-9/16 3/8 Sq. Dr. Socket Whitworth 9/16 6 point Length 35mm

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

Save $3.62
Ko-ken 3440A-1/2 3/8 Sq. Dr. Universal Socket 1/2 6 point Length 51mm

Ko-ken 3440A-1/2 3/8 Sq. Dr. Universal Socket 1/2 6 point Length 51mm

SKU: KK-3440A-1/2
MPN: 3440A-1/2

Save $7.30
Ko-ken 3440A-11/16 3/8 Sq. Dr. Universal Socket 11/16 6 point Length 54.5mm

Ko-ken 3440A-11/16 3/8 Sq. Dr. Universal Socket 11/16 6 point Length 54.5mm

SKU: KK-3440A-11/16
MPN: 3440A-11/16

Save $7.64
Ko-ken 3440A-3/4 3/8 Sq. Dr. Universal Socket 3/4 6 point Length 56.5mm

Ko-ken 3440A-3/4 3/8 Sq. Dr. Universal Socket 3/4 6 point Length 56.5mm

SKU: KK-3440A-3/4
MPN: 3440A-3/4

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Ko-ken 3440A-3/8 3/8 Sq. Dr. Universal Socket 3/8 6 point Length 48mm

Ko-ken 3440A-3/8 3/8 Sq. Dr. Universal Socket 3/8 6 point Length 48mm

SKU: KK-3440A-3/8
MPN: 3440A-3/8

Save $7.10
Ko-ken 3440A-5/16 3/8 Sq. Dr. Universal Socket 5/16 6 point Length 47mm

Ko-ken 3440A-5/16 3/8 Sq. Dr. Universal Socket 5/16 6 point Length 47mm

SKU: KK-3440A-5/16
MPN: 3440A-5/16

Save $7.10
Ko-ken 3440A-5/8 3/8 Sq. Dr. Universal Socket 5/8 6 point Length 53.5mm

Ko-ken 3440A-5/8 3/8 Sq. Dr. Universal Socket 5/8 6 point Length 53.5mm

SKU: KK-3440A-5/8
MPN: 3440A-5/8

Save $7.30
Ko-ken 3440A-7/16 3/8 Sq. Dr. Universal Socket 7/16 6 point Length 49.5mm

Ko-ken 3440A-7/16 3/8 Sq. Dr. Universal Socket 7/16 6 point Length 49.5mm

SKU: KK-3440A-7/16
MPN: 3440A-7/16

Save $7.10
Ko-ken 3440A-9/16 3/8 Sq. Dr. Universal Socket 9/16 6 point Length 51mm

Ko-ken 3440A-9/16 3/8 Sq. Dr. Universal Socket 9/16 6 point Length 51mm

SKU: KK-3440A-9/16
MPN: 3440A-9/16

Save $7.30
Ko-ken 3440M-10 3/8 Sq. Dr. Universal Socket 10mm 6 point Length 48.5mm

Ko-ken 3440M-10 3/8 Sq. Dr. Universal Socket 10mm 6 point Length 48.5mm

SKU: KK-3440M-10
MPN: 3440M-10

Save $6.45
Ko-ken 3440M-11 3/8 Sq. Dr. Universal Socket 11mm 6 point Length 49.5mm

Ko-ken 3440M-11 3/8 Sq. Dr. Universal Socket 11mm 6 point Length 49.5mm

SKU: KK-3440M-11
MPN: 3440M-11

Save $6.45
Ko-ken 3440M-12 3/8 Sq. Dr. Universal Socket 12mm 6 point Length 50mm

Ko-ken 3440M-12 3/8 Sq. Dr. Universal Socket 12mm 6 point Length 50mm

SKU: KK-3440M-12
MPN: 3440M-12

Save $6.63
Ko-ken 3440M-13 3/8 Sq. Dr. Universal Socket 13mm 6 point Length 51mm

Ko-ken 3440M-13 3/8 Sq. Dr. Universal Socket 13mm 6 point Length 51mm

SKU: KK-3440M-13
MPN: 3440M-13

Save $6.63
Ko-ken 3440M-14 3/8 Sq. Dr. Universal Socket 14mm 6 point Length 51mm

Ko-ken 3440M-14 3/8 Sq. Dr. Universal Socket 14mm 6 point Length 51mm

SKU: KK-3440M-14
MPN: 3440M-14

Save $6.63
Ko-ken 3440M-15 3/8 Sq. Dr. Universal Socket 15mm 6 point Length 53.5mm

Ko-ken 3440M-15 3/8 Sq. Dr. Universal Socket 15mm 6 point Length 53.5mm

SKU: KK-3440M-15
MPN: 3440M-15

Save $6.63
Ko-ken 3440M-16 3/8 Sq. Dr. Universal Socket 16mm 6 point Length 53.5mm

Ko-ken 3440M-16 3/8 Sq. Dr. Universal Socket 16mm 6 point Length 53.5mm

SKU: KK-3440M-16
MPN: 3440M-16

Save $6.63
Ko-ken 3440M-17 3/8 Sq. Dr. Universal Socket 17mm 6 point Length 54.5mm

Ko-ken 3440M-17 3/8 Sq. Dr. Universal Socket 17mm 6 point Length 54.5mm

SKU: KK-3440M-17
MPN: 3440M-17

Save $6.71
Ko-ken 3440M-18 3/8 Sq. Dr. Universal Socket 18mm 6 point Length 54.5mm

Ko-ken 3440M-18 3/8 Sq. Dr. Universal Socket 18mm 6 point Length 54.5mm

SKU: KK-3440M-18
MPN: 3440M-18

Save $6.96
Ko-ken 3440M-19 3/8 Sq. Dr. Universal Socket 19mm 6 point Length 56.5mm

Ko-ken 3440M-19 3/8 Sq. Dr. Universal Socket 19mm 6 point Length 56.5mm

SKU: KK-3440M-19
MPN: 3440M-19

Save $6.96
Ko-ken 3440M-21 3/8 Sq. Dr. Universal Socket 21mm 6 point Length 56.5mm

Ko-ken 3440M-21 3/8 Sq. Dr. Universal Socket 21mm 6 point Length 56.5mm

SKU: KK-3440M-21
MPN: 3440M-21

Save $8.05
Ko-ken 3440M-8 3/8 Sq. Dr. Universal Socket 8mm 6 point Length 47mm

Ko-ken 3440M-8 3/8 Sq. Dr. Universal Socket 8mm 6 point Length 47mm

SKU: KK-3440M-8
MPN: 3440M-8

Save $6.45
Ko-ken 3440M-9 3/8 Sq. Dr. Universal Socket 9mm 6 point Length 47.5mm

Ko-ken 3440M-9 3/8 Sq. Dr. Universal Socket 9mm 6 point Length 47.5mm

SKU: KK-3440M-9
MPN: 3440M-9

Save $6.45
Ko-ken 4300A-1 1/2 Sq. Dr. Socket 1 6 point Length 77mm

Ko-ken 4300A-1 1/2 Sq. Dr. Socket 1 6 point Length 77mm

SKU: KK-4300A-1
MPN: 4300A-1

Save $5.57