Lay Flat Repair Plug Kits have everything needed for a quick repair. The PK-1 kit comes with their standard 1/2 in. plug (150 pcs.). The kit includes an insertion tool, reamer, instruction card and tool box. Large quantities are used with drip irrigation for the farm industry and in spot repairs in many Oil Fields. Any place where Lay Flat hose is used, the plugs stop leaks. Plugs are designed to plug holes up to 1/2" diameter, with the holding pressure of up to 50 PSI- the smaller the hole the greater the holding pressure. Many plugs can be used in the same hose. The "arrow" design insures a tight seal to the inside of the hose.