Vernier Caliper Our digital Vernier Calliper lets you measure and record internal and external distances with incredible precision. Featuring a clear LCD display, the Vernier Calliper has a measuring range of 0-12-inches (300mm) and improves accuracy when performing tasks such as measuring and fitting joints, checking board thicknesses or setting cutting depths. Its stainless steel jaws and blade are extremely durable and resistant to corrosion, giving you a Vernier Calliper that’s built to withstand decades of use. And, it comes equipped with both a spare battery and a sturdy open ring attachment, providing a fixed point of tether. This useful feature is highly effective in stopping equipment from falling when working from height.