Description This caliper is well made of with hardened and finely polished points for and practical use. It measures ID for hole diameters and groove and tube thicknesses. Besides, it features a solid nut for precise fine adjustments that will securely hold any measurement.-portable caliper measuring tool Feature-spring divider caliper - -manual sliding caliper - Material: Stainless steel.-thickness outer diameter measuring gauge - Size: Approx. 15 x 6 x 0.5 cm / 5.9 x 2.4 x 0.2 inch ( W x H).-Inside ID Calipers - -spring dividers calipersStainless steel with hardened fulcrum spring and points for long life.-caliper measuring tool - -adjustable caliperFeatures quick-spring nut for rapid and precise fine adjustment. - Used for measuring and transferring precise measurements. -inside calipers - Adjustment mechanism is central located to assure smooth action.-ID Calipers Stainless steel with hardened fulcrum spring and points for long life -measuring caliper Adjustment mechanism is central located to assure smooth action-depth gauge caliper Material: Stainless steel -measurement caliper tool Features quick-spring nut for rapid and precise fine adjustment -mechanical caliper Used for measuring and transferring precise measurements -external gauge caliper