This is stainless outside diameter measurement caliper. It is made of stainless steel material, to use. , rustproof, easy to use, excellent and for thickness measurement for woodworking tool. Features - Color: Mainly silver. - Material: Stainless steel. - Size: 9.10X5.30X0.90cm/3.58X2.08X0.35inch. - It is made of stainless steel material, and safe, excellent and simple, serving for long time. - The gaps gauge caliper is simple and easy to use, bring much convenience to you. - It is lightweight, easy and convenient to carry and store when not in use without any effort. - The simple design will ensure its high performance as excellent thickness measurement tool. - Detachable fixed nut for easy adjustment, suitable and excellent for woodworking tool. Package list: 1 x inner and outer diameter measurement caliper