Ko-Ken KO4137 Bit Holder, 1/2 in drive
Available
Ko-Ken 2137, 3137 and 4137 are bit holders with square drives of 1/4 in, 3/8 in and 1/2 in.
Lengths are 22.5, 30 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 1/4 in hex bits
Key specifications
| Model | Drive | Length | Dimensions | Weight |
|---|---|---|---|---|
| KO2137 | 1/4 in | 22.5 mm (manufacturer-stated) | D1 12, D2 12 mm (manufacturer-stated) | 13 g (manufacturer-stated) |
| KO3137 | 3/8 in | 30 mm (manufacturer-stated) | D1 13, D2 16.5 mm (manufacturer-stated) | 30 g (manufacturer-stated) |
| KO4137 | 1/2 in | 38 mm (manufacturer-stated) | D1 13, D2 22 mm (manufacturer-stated) | 53 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 2138, 3138 and 4138 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.
Couldn't load pickup availability
Secure Checkout. We do not store credit card details
-
1/2"
Model Number: KO4137
-
1/4"
Model Number: KO2137
-
3/8"
Model Number: KO3137

