Ideal for off angles and outside 90 deg. Corners, vaulted ceilings, coffered ceilings, butterfly vaults, and Bay windows. Straightens framing irregularities. Memory-free hinge design allows for ease of installation, straighter corners, and perfect angles. Diamond-punched 94 lb. Paper edging allows for easier feathering, faster drying, and the highest bonding strength. Also guarantees an even lay-down of the paper providing maximum adhesion with no rippling or blistering. Pur-laminated nose ensures perfect corners without paper fuzz-up during finishing and sanding. Second coat of compound can be applied immediately with a very light skim-coat to finish. Cuts easily with knife or scissors. Rustproof. No cracking.