Special Features:

Consists of a horizontal and vertical sliding scale; 48 in. Min lg horizontal scale, 18 in. Min lg vertical scale; both scales graduated in 8ths; scales joined at sliding block; specially designed for measuring tire diameer and tire cross section

Properties:

A measuring tool used for close and quick reading of both inside and outside measurements. It consists of a ride stock with fixed jaw, an internal sliding graduated tongue with integral jaw, and slide locking device. For items designed to indicate both the circumference and the diameter of circles, cylinders, spheres, etc., see caliper, slide, diameter-circumference.