The Kapro #444 Ergocast™ moulded Rafter Square is a value for money 180mm Square with easy to read graduations and a ledge base for efficient layout and marking. Features: Durable and lightweight Ergocast™ Material. Moulded-in conversion tables. Wide base for additional stability. Fields of Application: Carpentry Drywall Drafting Advantages: Base enables easy & stable layout & marking. Easy-to-Read gradations.