Quick Summary
The Hultafors OK4 Insulation Knife is a mineral wool knife with a serrated edge, a pointed blade and an ergonomic handle. It is described as having an overall length of 465 mm, with a 316 mm blade that is 50 mm high.
The blade is made of Japanese carbon steel and includes a scale up to 30 cm for quick measurements. The handle is made from PP plastic and has a hanging hole at the end.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Product type | Insulation knife for cutting mineral wool and related insulating materials. |
| Overall length | 465 mm, which affects reach and handling. |
| Blade length | 316 mm, giving the working cutting length. |
| Blade height | 50 mm, a visible blade dimension to compare with your cutting needs. |
| Blade material | Japanese carbon steel. |
| Handle material | PP plastic. |
| Blade scale | Marked up to 30 cm for quick measurements. |
What to Compare Before Buying
- Blade length: The stated 316 mm blade is the main cutting length to compare against the materials you plan to cut.
- Blade shape: This knife has a serrated edge and a pointed blade, so check that this suits the way you work.
- Handle design: The PP handle includes a hanging hole, which may matter if you store tools on hooks.
- Measurement marking: The built-in scale up to 30 cm is useful if you want a blade that also supports quick marking.
Before You Decide
Check the blade length, overall size and cutting style before choosing this knife. It is aimed at insulation and fibrous materials, so make sure that matches the task you have in mind. Follow the manufacturer’s instructions for correct use.
