Westcott Transparent Protractor Ruler with sturdy quality and convenient design gives you the best using experience. This protractor ruler has 180 degree protractor making it ideal for your kid's next maths project. Clear ruler made of transparent plastic which is laminated for durability. Westcott focuses on creating innovative designs that provide style and quality to an assortment of school, craft, and office products which are perfect for your drafting and drawing needs.