Way way back, Fein invented the oscillating tool, and when their patent ran out, we saw a wave of multi-tools flood the market. That sort of leveled the playing field, until now. Fein has teamed up with Bosch to create the Starlock system, and they have raised the bar once again. 
Now what is the Starlock? Its a new type of blade mount which is said to transfer 100% of the tool power directly to the attachment. This is a completely slop-free connection. Fein also claims up to 35% more efficiency when using certain cutting attachments. To achieve this, they have removed the center loose retaining pin (you know, the one we all drop), and replaced it with two semi-circular fingers, which automatically spread apart to draw the blade into a lobed connection cup. The cup mates perfectly with the raised hump on the blade. Its super simple and extremely fast, as you can pick up blades without even handling them. This means releasing and attaching hot blades is a breeze.
Now I know what you are thinking, but this is not a cash grab or a “re-invention of the wheel.” Fein has actually streamlined their blade manufacturing process, which also means prices have dropped. With all the action on the market, Fein understands the need for high end blades at reasonable prices. Bosch and Fein are the two largest oscillating tool blade manufacturers on the market, so to have them team up just makes perfect sense. End users get amazing blades at very competitive prices.
As I mentioned, the connection is extremely simple. All you need to do is press the tool into the blade, or vice versa. Once light pressure is applied to the connection, the fingers spring open to grab the blade and draw it tight. This process takes less than half a second. To release a blade, just lift the blade release lever on the back of the tool, and the blade will fall off. This is without a doubt the fastest system on the market.
The model I am testing is the FMM350QSL, which is almost identical to the FMM350Q (its predecessor). This multitool has a full body dampening system which reduces vibration by up to 70% when compared to other tools on the market. The motor and drivetrain are suspended by rubber pads within the outer shell. This makes a huge difference in comfort, and it’s a Fein exclusive feature. What’s interesting is the new Starlock model feels even smoother. I assume this has to do with removing that last bit of microscopic slop from the connection point. If you are looking for a new top end oscillating tool, look no further. Fein has completely blown me away, and I recommend this tool to anyone from a DIY craftsman to the most demanding installer. 
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