Phillips kwikSTIK® P1 X EL NB outside square corner bead is designed as an economical product. This product features no bead meaning minimal joint compound is required for installation. Phillips P1 X EL NB features approximately 20% thicker steel than ASTM standard C1047 minimum requirement for a strong, durable corner. No fasteners or nails are needed for installation, and specially engineered paper provides superior mud and paint adhesion.