Using the JAKEMY Wire Stripper JM - CT4 - 12 is easy. First, select the right wire size on the stripper. Then, place the wire into the appropriate slot and gently squeeze the handles. This will strip the wire insulation cleanly. When using, make sure your hands are dry to avoid any slipping. After each use, wipe the stripper with a dry cloth to keep it clean. Store it in a dry place away from moisture to prevent rusting. And always be careful not to over - squeeze the handles as it may damage the tool.