Imbeds joint and structural corner tapes into internal corners, smoothing tape to form sharp straight corners. Built TradeTuff® with USA billet aluminium and split hardened steel components. Unique Delrin roller wheels eliminate tape drag upon initial contact, immediately embedding tape and push unneeded compound out from behind. Pivot heads adjust to angle ensuring a perfect operation every time. Can be used with fixed or extendable handles. 5-year warranty.