ITEM NAME:6pcs/set Multi-Ruler Spinal Finger Goniometer Angle Spinal Ruler N3G1 Included: 3 piece 360 Degree Goniometer Set-Including 6/8/12inch Goniometer; 8inch Spinal Goniometer; 6inch 180 degree Goniometer & Finger Goniometer. Material: Hard plastic; 360 degrees of coverage in 1-degree increments; Double scale design, the measuring arm has both inches and centimeters as the unit of measurement. Design :All medical rulers are made of transparent hard plastic, which can clearly observe the range of motion of the joint, and can be used in various occasions with 360-degree rotation. Occasion:The medical ruler set is a professional ruler, which can be used for measuring the range of medical joint motion, measuring the range of finger movement, measuring the angle of the spine, etc. It can also be applied to the production of architectural drawings and horizontal measurement. Service: If you are unsatisfied with the purchase, please directly via Amazon to.Do not cut anything along the ruler edge;.