Ko-Ken KO4138 Bit Holder, 1/2 in drive
Available
Ko-Ken 2138, 3138 and 4138 are bit holders with square drives of 1/4 in, 3/8 in and 1/2 in.
Lengths are 26 and 38 mm. (manufacturer-stated)
Each model is listed in the table below with its specifications.
Where this product is used
- Holding hex-shank screwdriver bits in a square drive ratchet, handle or extension bar
- Driving screws and fasteners where a bit needs the leverage of a ratchet
- Workshop and maintenance work that combines socket and bit drive tools
Features
- Takes 5/16 in hex bits
Key specifications
| Model | Drive | Length | Dimensions | Weight |
|---|---|---|---|---|
| KO2138 | 1/4 in | 26 mm (manufacturer-stated) | D1 16, D2 16 mm (manufacturer-stated) | 32 g (manufacturer-stated) |
| KO3138 | 3/8 in | 38 mm (manufacturer-stated) | D1 16, D2 18 mm (manufacturer-stated) | 55 g (manufacturer-stated) |
| KO4138 | 1/2 in | 38 mm (manufacturer-stated) | D1 16, D2 22 mm (manufacturer-stated) | 62 g (manufacturer-stated) |
Lengths and weights are manufacturer-stated (Ko-ken catalogue 2025-26).
Selecting the right option
Match the square drive to your handle or ratchet, and the hex size to your bits.
Related products
Related Ko-Ken products: Ko-Ken 2137, 3137 and 4137 Bit Holder, 1/4, 3/8 and 1/2 in Drive, Ko-Ken 18107 Impact Bit Holder and Ko-Ken 2760, 3760, 4760, 6760 and 8760 Extension Bar, 1/4, 3/8, 1/2, 3/4 and 1 in Drive.
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1/2"
Model Number: KO4138
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1/4"
Model Number: KO2138
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3/8"
Model Number: KO3138

