Depth gauge with counter displayed in meters.One-touch specification that can be attached simply by sandwiching it at the desired position on the rod.Wrap the line 2-3 times so that the roller rotates clockwise, apply tension and then release the line, and the counter will be displayed in units of 1 m.When rewinding the line, it can be used for length measurement, so the line is not wasted.Can be attached to a rod with a diameter of 15 to 25 mm.