This is, by far, the best safety device I've ever used on a table saw. It installs quickly and does exactly what it is supposed to do - act as a 'riving knife' to keep boards being ripped from pinching the tablesaw blade and kicking back at the operator. I used three of these for thirteen years running a high school cabinetmaking shop program, and never had a board kick back at me or any of my students - and here we're talking about literally thousands of operations performed by high school students just... more info