Feeler Gauges, Vernier Calipers -Precision Carbon Steel Pencil Drawing Scriber Divider 100mm Marking Tools Highlights Generic Brand Steel Pencil Drawing Scriber Divider 100mm Marking Tools precision carbon steel Description: Made of high quality carbon steel, with fine workmanship, it is precise, rustless and durable. Turn the nut in the middle of the compass to adjust the diameter of the circles. Please do not adjust the diameter larger than the maximum ones, or the compass will be broken and cannot be repaired. Geometry tools, perfect for math lessons, drafting, architectural drawings, engineering studies, mechanical design and construction. Good for students, teachers, engineers, designers, artists, etc. Specification: Material: Carbon Steel Color: Silver 100mm: Overall Length: 105mm/4.13inch; Max Reach: 110mm/4.33inch 125mm Overall Length: 130mm/5.12inch; Maximum Reach: 165mm 150mm Overall Length: 150mm / 5.91inch; Maximum span: 175mm 200mm Total length: 205mm / 8.07inch; Maximum reach: 275mm 250mm Total length: 260mm / 10.24inch; Maximum reach: 375mm 300mm Total length: 305mm / 12.01inch; Max Reach: 415mm / 16.34inch Package Include: 1 Piece Scriber Compass Pencil Note: 1. Please allow a little difference between the real item and the pictures due to the difference of monitors 2.Please allow please measurement errors.