Louët makes a few tools for bookbinding, such as this awl gauge. The gauge is a very efficient tool to help piercing the sections for sewing. There is a 90-degree trough that holds the opened section for piercing, while the trianglar bar fits on top of the section to hold it in place. The triangular bar has pre-set hold patterns which helps you to pierce the holes pretty quickly. The knob allows you adjust the position of the holes for different positions on the section.