Works best in flat applications, as opposed to being wrapped around a 90 degree corner. Unless a hasp or lock is used. Superior flex-life, slim low profile, impact resistance Hinges are manufactured using high grade impact materials for maximum durability (Bonding adhesive not provided) Quality controlled production to ensure secure attachment/retention of moving parts The living hinge extruded from high-impact acrylic and a urethane elastomer The living hinge extruded from high-impact acrylic and a urethane elastomer.