Strait-Flex Original is the most versatile, multipurpose drywall tape from strait-flex. Strait-Flex is applied with all-purpose joint compounds to 90 degrees outside corners, inside corners and angles which can be expertly finished. Manufactured from Strait-Flex patented composite material, this tape is extremely strong and will no fuzz-up when sanding. Resists dents and point chipping. Cuts easily with a knife or scissors. Does not rust.