New 3 Piece High Precision Measuring Set - 12" / 300mm. Inside and Outside Spring Caliper Flat Leg Divider Set with Adjusting Screw. A trio of popular engineers measuring instruments. Great for many applications such as mechanical scribing, crafts and hobbies, leather marking, technical drawing, architectural drawing and design, scale measuring, and more. The adjusting screw has a self-seating washer and nut to allow for quick and precise tension and size adjustment without removing the tool from the workpiece. Made in Japan with high quality heavy duty steel to ensure accuracy. Sturdy, efficient and durable. The set includes: - Outside calipers: useful when measuring the external diameter of a round object or oddly shaped materials and then transferring that measurement to a ruler for flat representation. Rounded tips. - Inside calipers: used for measuring the internal diameter of an object, i.e gauging the inner diameter of an opening and then transferring that measurement to a ruler for flat representation. Rounded tips. - Flat leg dividers: useful for measurement transfer on uneven surfaces, perfect for contour tracing and drawing circles or arcs. Sharp tips.