Features Place it on the work area, slide the ruler into the desired shape, and tighten the screws Can make perfect measurements, now you can transfer and track them to any material Using high‑quality stainless steel materials, strong and durable, has a long service life Easily to fold and store, can be operated with one hand, and has a unique fastening mechanism. No need to create a new template for each new work, nor to measure the same angle repeatedly Specification: Item Type: Goniometer Ruler Measurable Angle: 0-170° Ruler Length: Approx.381mm / 15in Ruler Width: Approx.20.3mm / 0.8in Measuring Side Length:Approx.170.2mm / 6.7in Package List: 1 x Goniometer Ruler Package List 1 x Goniometer Ruler