Sleeve, it is necessary

Most locks and loops are produced in standard sizes, so it is worth spending a little time to manufacture these devices, to then use them constantly. Devices can be made from scraps of thin MDF and bar. Before the manufacture of any templates for a cutter with a guide sleeve, it is necessary to determine the offset of the cutter. The offset of the cutter is half the difference in the diameters of the cutter and the guide bushing. This number must be increased or reduced by the size of the template, depending on whether it is external or internal.