Sorby Inside / Outside Caliper, 8-1/2 in. is an essential tool for any turner’s workshop, designed to provide precise measurements for both inside and outside dimensions. This caliper is for measuring turning wall thicknesses and aperture sizes, helping to improve accuracy and efficiency during your turning projects. Its unique mirror image design allows the measurement taken at one end to be automatically transferred to the opposite end, enabling you to get an accurate reading without having to remove the caliper from your workpiece. Crafted from corrosion-resistant plated steel, it features a friction fit adjustment point for smooth and reliable use. The caliper’s size is measured from the pivot point to the tool tip, making it a versatile and durable addition to your tool kit. Made in England, this caliper combines quality craftsmanship with practical functionality to enhance your woodworking experience. Model Number: H978500