This 7" (175mm) Rafter Angle Square boasts a solid Aluminium Alloy body for any job or worksite. The thick edge is useful as a saw guide. It can be used directly with the saw against the square for cross cuts or angled cuts using the stamped protractor scale   Integrated distance and angle scales let you quickly and accurately mark your cut lines Scales for cutting hip, valley and jack rafters For roofs, solar panel supports, stairs, cabinets trim work and many other layout projects The rafter scales are laid out mathematically to avoid time consuming calculations Permanent graduations with easy-to-read numbers Low-glare protective powder coated finish