The SeaSucker Spool Mount Leader Holder lets you keep spools of leader at hand so you're prepared no matter what fish show up to your party. Built-in spring tensioning prevents free spooling and backlash. The 4.5" SeaSucker vacuum mount attaches the Leader Holder wherever you need it, on both horizontal or vertical surfaces. Stainless hardware keeps corrosion at bay.• Accommodates up to 8 spools with 1/2" holes• Includes 2 adapters for spools with 3-1/4" holes• Measures 10"H• Deck is manufactured from UV-stabilized high-density polyethylene• Stainless hardware 4.5"" vacuum mount attaches wherever you need it Made from UV-stabilized high-density polyethylene