Grabber ULT450 No-Coat Ultra A Flex Prefinished Drywall Flex Trim "NO-COAT" ULTRAFLEX-450 DRYWALL CORNER Length: 100' World's #1 flex product for inside and outside off-angles. Ultra thin edge for 1-step installation and easy finishing. Structural drywall corners engineered to withstand shrinking lumber, settling, seismic movement, temperature variations, and truss uplift.