Inside calliper for internal measurements | Available size from 150mm to 300mm | Quick adjusting nut
This spring type outside calliper is intended for external measurements. It has a quick adjusting nut in one of the sides. This tool is black and silver coloured. It is available in various sizes, from 150mm to 300mm. Its universal spring allows you to draw accurate circles with all writing and drawing instruments. This is a very useful and easy to use tool.