Features Wide Application: This spring caliper has a very wide range of applications for woodworking, carpentry, metalworking, leatherworking, mathematics and more. Multifunctional: This spring caliper is versatile and perfect for drawing arcs, circles, index gauges, dividers, line segments, dimension measurements and more. Excellent Carbon Steel Material: This spring saddle is made of excellent carbon steel material, which is sturdy and wear-resistant, not easy to erode, and has a long service life. Sliding Nut Design: This spring caliper features a locking sliding nut that, in conjunction with spring tension, allows for quick leg adjustment and repeatable measurements. Compact and Lightweight: This spring saddle is small and lightweight, making it very convenient to carry and use when you go to work. Specification: Item type: spring caliper with pen case Application: Widely used in the field of mechanical scribing and leather production. Material: carbon steel Specification: Approx. 75mm/2.95inch Extended Size: Approx. 75mm/2.95inch Total length: approx. 125mm/4.92 inches Package list: 1x Spring saddle Package List 1 x Spring Caliper