[SIZE OF CALIPER SET]Our wing divider are made from high quality carbon steel. Package included 4 inch compass, 6 inch compass and 8 inch compass. 3 sizes are available to meet your every need. [RUST PROOF] We use Carbon steel material to make woodturning calipers to that wing divider compass can work longer without and rust [DIVIDER CALIPER]A useful dividers tool for uneven surfaces, great for drawing arcs, circles, making outlines, line segments, dimensioning, protractors, dividing lines, edge marking, etc. Widely used in leatherworking, woodwork, metalwork and other drawing work. [DESIGN]The divider caliper is great for gauging the diameter of an opening and then transferring that measurement to a ruler. [Adjustable Width]The steel legs feature hardened points for precise marking of the work piece, precise fine adjustment due to solid nut. Works perfect for wood turning lathe projects., Weight: 0.78043640748 pounds, Manufacturer: Kueohse