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The only complaint is that it's a bit of a pain to attach it and set it up on the sander. It would also help prevert damaging a small patch of wood floor that you're trying to repair. (But the 21" sander is not the right tool to strip a large area of flooring). A frame reduces the chance that you'll gouge a depression in the wood surface you're sanding with a belt sander. It's not just a snap-on, so you may not want to spend the couple of minutes to to attach it on simple jobs even though it could be helpful. It rides on one of two inserts -- one with short bristles that glide along the surface of the wood and the other having a hard plastic surface. This one fits the Bosch 21" belt sander (1274DVS). With both inserts, you can adjust the height above the sanding belt to control the amount of wood you remove.It works well and when you're finishing a table top it can prevent you from messing up a project that's almost complete.
Changing inserts is a hassle.Also, it seems awfully expensive. screws holding the inserts in place. Both are nice but there are thirteen ().
It makes it easy to get a super flat finish.But be careful. A hard plastic insert for when you want to get the board perfectly flat. This tool is very nice.
And a brush insert for more delicate work. On the other hand, if it prevents you from ruining one or two glued-up boards, it can easily pay for itself. The clip that holds the frame to the sander is not, in my opinion at least, strong enough.
The sander can work itself free if you don't handle it carefully.The frame has two inserts.
Though difficult to precisely align the sanding frame with the surface of the sanding belt, once this is done, sanding delicate surfaces becomes nearly risk free.
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