What is Starlock? Starlock, StarlockPlus & StarlockMax Explained

Dec 09, 2025

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Are you wanting to buy a multi-tool, but you're unsure what the difference between Starlock, StarlockPlus and StarlockMax is? Don't worry, we'll explain everything you need to know.
1. Multi-tool Interfaces
A multi-tool's interface is its accessory-fitting system. Multi-tools either have an older OIS interface or a newer Starlock interface.
2. What is OIS?
The Oscillating Interface System (OIS) was created by Bosch in 2010. It was the first standardised accessory-fitting system for oscillating tools, allowing you to use different brand's accessories with different brand's oscillating tools.

 

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3. What is Starlock?
Starlock was created by Bosch and Fein in 2016. It's an improved standardised accessory-fitting system for multi-tools. Starlock accessories have a future-proof 'cake-tin' pattern for a 3D connection between the motor and accessory. This ensures 100% power transfer for maximum performance, stability and precision.
There are three Starlock categories: Starlock, StarlockPlus and StarlockMax.
5. What's the Difference Between Starlock, StarlockPlus & StarlockMax?
Each Starlock multi-tool category indicates different power outputs. Starlock multi-tools are the standard range. StarlockPlus multi-tools are more powerful. StarlockMax multi-tools are the most powerful.
Each Starlock accessory category is designed to match the power output of its compatible multi-tools. Starlock accessories fit all multi-tools, no matter if they have a Starlock, StarlockPlus, StarlockMax or OIS interface. (DeWalt multi-tools require an adapter.) StarlockPlus accessories fit all multi-tools with a StarlockPlus or StarlockMax interface. StarlockMax accessories fit all multi-tools with a StarlockMax interface.
Note: Accessories with an OIS interface aren't compatible with Starlock multi-tools.

 

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