Measure only once and permanently locate layout points for any sports field. These one-piece durable marker anchors with built-in string guide are easy to install. Simply punch a hole in the ground with the starter tool, set the marker, string the line and stripe. If the line fades, re-stripe or re-string the markers with no re-measuring. Unique design will not catch cleats or attract debris. Anchor sets include anchors, starter tool and 600′ of cord.