ITEM NAME:1PCS Stainless Steel Circle Drawing Compasses Geometry Math Drafting Tools Store Home | Clothes, Shoes & Accessories | Home, Furniture & DIY | Toys & Games | Dolls & Bears | Baby | Jewellery & Watches | Health & Beauty | Crafts | Collectables 1PCS Stainless Steel Circle Drawing Compasses Geometry Math Drafting Tools Description: Made of high quality carbon steel, with fine workmanship, it is accurate measurement, no rust and is durable. Turn the nut in middle of compass to adjust the diameter of circles. Please do not adjust the diameter bigger than the maximum ones, or the compass will be broken and cannot be repaired. Geometry tools, perfect for math classes, drafting, architectural drawings, engineering designs, both mechanical design and construction. Good for students, teachers, engineer, designers, artists, etc. Specification: Material: High-Carbon Steel Size Chart: Size: Approx. 106x35mm / 4.17x1.38inch Package Includes: 1 Piece Stainless Steel Compass Note: 1.Please allow a little difference between the real item and the pictures due to monitors difference. 2.Please allow some measurement errors..1 Piece Stainless Steel Compass. Material: High-Carbon Steel.