The most difficult part of cutting wood to length with a circular or jig saw is accurately aligning the saw blade to our pencil mark. Unlike a standard square, the Kreg square-cut features an adjustable guide arm which locks-in your saw"s unique base-to-blade offset, allowing you to instantly align your saw blade to the pencil mark and make perfect 90-degree cuts, time after time. The square-cut"s adjustable guide arm compensates for the length from the blade to the edge of your base plate, and can be set to match any circular saw or jig saw. Features: * Switch back and forth between any circular or jig saw * Adjustable arm requires no trimming * Supports work pieces up to 12 inches wide * Low-profile design won"t interfere with saw * Built-in roof pitch scale for cutting siding What"s In The Box: * Kreg KMA2600 Square Cut