Customers must pay attention to the following points when using: 1.To prevent the interruption of White Steel Prong tooth When you hit it, it must be perpendicular to the epidermis.When using the leather hammer to hit White Steel Prong, pay attention to the strength of your hands, first light and back heavy. 2.Please be sure to cooperate with the rubber seal. 3.When not using the leather hammer, apply some oil to its surface and store it in a dry and ventilated place. Operation procedure Step 1、Adjust the spacing gauge, set the spacing of the line Step 2、 Draw the equidistant line on the leather Step 3、The 6-tooth prong is used on the long line, saving time and effort Step 4、Continue punching in the direction of the previous slotted hole. Do not punch the hole by visual inspection