Aligning a long fence parallel to a narrow blade is an imprecise operation. This tool is a set of 6" magnetic blocks that each register on the blade body (there is a machined gullet for the teeth). This lets you set your fence parallel to the block – a much easier task. Additionally, the blocks can be used singly or in combination to set an accurate fence spacing from the blade body.
The set includes 1/8", 3/16", 1/4", 3/8" and 1/2" bars, and makes setting blade spacing a snap. The blocks can also be used for precise setting/spacing on a router table. The foam storage block is adhesive backed for mounting in a drawer or on a wall. The magnetic bars can even be attached directly to your saw.