The Wall mounted deflection bead prevents inside corner cracking when installed against a ceiling or concrete deck that may be subject to structural movement. The flexible gasket expands and compresses providing up to 10mm total deflection. The 6mm Tear Away strip leaves a clean, finished edge reducing labour and cleanup. Have you used this bead before? #Wallboardtools #Trimtex_drywall #Trimtex_ANZ #Plastering #Drywall | Wallboard Tools