In addition to having all the features found on a standard 7-inch rafter square, the new Johnson Johnny Square can mark accurate rip cuts. That means that along with the common rafter scale, the hip and valley rafter scale, and the degree scale, it has a slot with notches at 1/8-inch increments for making continuous scribe lines along the length of a board. The tool is made of aluminum with recessed markings and has a powder-coated finish to prevent glare when it’s used outside. It comes with a detailed instruction booklet for rafter cutting. Price: $10. 262-242-1161.