Quality: made of stainless steel and equipped with polished anti-rust hardware, these pottery rulers are sturdy, highly hard, , has a long service life, and its and edges are smooth without burrs Easy to Use: , allowing you to operate it with ease; The size range of the internal caliper is the same as that of the external caliper; The firm joint caliper uses the friction force at the joint to fix the outriggers, preventing them from moving and providing an excellent anti-slip effect Four Sizes: 4 inches, 8 inches, 10 inches, and 12 inches; More sizes are available to meet your needs; This pottery caliper set is ideal for shaping, engraving, sculpting, and smoothing clay, wax, and soft media; A 12-inch steel ruler is included as a gift for your convenience in confirming the height of the ceramic Clay Caliper Tool: the ceramics tools are and easy to operate, making it very suitable for measuring clay sculptures; It is a practical tool for both clay sculptors and craft enthusiasts Application: the external caliper measures the thickness and outer diameter of an object, while the internal caliper measures the distance between the hole diameter and the ; It is highly suitable for measuring the external and internal dimensions of objects, such as sculptures, pottery, clay, pipes, holes, etc, Weight: 0.8624924613964 Pounds, Manufacturer: UieoKakeh