Are multi-tool blades universal? OIS, Starlock and more

Older mounts and universal fit

Early multi-tools used various pin and star patterns. Fein and Bosch used the OIS (oscillating interface system), a star pattern with 12 points. Other brands had their own patterns. Many blades are sold as universal fit, with an open ended slot and a pattern of holes that suits many older tools.

Universal blades are convenient but held only by a bolt and clamping washer, so they can slip under heavy load and are slower to change.

The Starlock family

Starlock uses a three dimensional star shaped interface that locks the blade positively and transfers power without slip. Blades click in without tools on tools designed for it. There are three performance levels, with blades marked by colour coded labels.

The rule is simple: a blade fits tools of its level and higher, not lower.

Which tools take which blades

Listings usually name the mount. Some current examples from our guide:

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What each level is for

Starlock is the base level for general cutting, sanding and scraping. StarlockPlus is for more powerful tools and tougher jobs, such as longer plunge cuts. StarlockMax is for the most powerful tools and heavy work, such as cutting through thick timber with nails. Higher level blades are thicker and stiffer to handle more power.

Do other brands use Starlock?

Yes. Many brands now build tools with Starlock family mounts, including HiKOKI and Metabo models listed above. Some brands also keep their own quick change systems that accept certain blades. Always check the tool's listing or manual, and look for the Starlock, StarlockPlus or StarlockMax mark on blade packs.

Changing a Starlock blade

On tools with a Starlock family quick change, you open a lever or press a button, the old blade drops out, and you push the new blade onto the mount until it clicks. No key or bolt is needed. The blade can be set at different angles around the mount, which helps when reaching into corners.

On tools with a bolt and washer, undo the bolt with the supplied key, fit the blade over the pins or star, and tighten firmly. Recheck after a few minutes of use, as vibration can loosen it.

1. 1

   Remove the battery or unplug the tool.

2. 2

   Let the old blade cool, then release it.

3. 3

   Choose the blade angle that suits the job.

4. 4

   Push the new blade on until it locks.

5. 5

   Check it is secure before starting.

Signs a blade is worn

A worn wood blade cuts slowly, burns the wood and needs more pressure. Teeth may be rounded or missing. Grout blades lose their carbide grit and polish rather than cut. Worn blades make the tool vibrate more and work harder, so replace them promptly.

Bi-metal blades last longer than plain steel ones in timber with hidden nails or screws.

Adaptors

Adaptors exist to fit some blade types to other mounts. They can work, but they add play and can reduce the clamping force, which increases vibration and slip. For regular use, buy blades made for your tool's mount.

Buying blades

Start with a mixed pack that suits your jobs: a wood plunge blade, a bi-metal blade for nails, a segment blade, a grout blade and a sanding pad. Buy spares of the blade you use most. Learn what each does in what is a multi-tool used for.

Note:Remove the battery or unplug the tool before changing blades, and let the blade cool, as it can get hot. Make sure the blade is fully locked before starting. Wear eye protection and follow the manual.

Frequently asked questions

Will Bosch blades fit my Makita multi-tool? If both use the same Starlock level, often yes. Check the mount named in your Makita tool's manual and the blade pack.

Can I use a StarlockMax blade in a Starlock tool? No. StarlockMax blades only fit StarlockMax tools.

Are universal blades any good? They are fine for light jobs on older tools, but they can slip on powerful tools. Use the correct Starlock level where possible.

What does OIS mean? Oscillating interface system, an older Fein and Bosch star shaped mount.