The seam measuring gauge has 45-degree line for trimming half-square triangles Made of transparent green acrylic material, which is lightweight and durable to use Description: It is suitable for household sewing machines and can be used with fabrics to make seam allowance patterns positioning ruler, marked before quilting, which can be used with wheel cutter or sewing machine, Weight: 0.06172943336 Pounds, Manufacturer: KIXZSAZ