Check the listing for details. Fox Edges Grappling Marker Leads. Condition: New. Listed at 10.75 USD. Grappling Marker Leads. Grappling Marker Leads have been designed with cavities and wire prongs to collect weed and debris to gain the extra detail that a standard marker lead can't. - Once you have identified a likely-looking spot with a normal lead simply swap to this design for a more thorough investigation.