This quality made tool is designed to easily open notched, screw-on watch cases and is built to last a lifetime. Its large design provides all the torque and power you will need to open any case you may run into. The tapered composite handle gives you excellent control which helps to prevent the tendency of the tool to tilt when applying high torque. The pins are adjustable from 14mm to 65mm giving it the ability to open the new style large and jumbo watch cases, and with its conveniently located adjustment knob, you can quickly and easily move the pins into the proper position with just your thumb. The tool comes with 2 square pins that sit in the adjustable jaws, there are a total of 6 different style pins for various style screw-on watch backs (these pins interchange with the larger Horotec opener # 64.0920). Overall length is 7.5" inches (190mm).