The video shows precise and simple notching of roundings in inside corners. The result is a ready-to-install, sharp-edged inside corner. This is made possible by a special manual machine that is precisely customised for this application. The extensions of the inside corner sides are produced right up to the corner tip in a single stroke. There is no need for time-consuming and risky manual chiselling and reworking with a file. The MZ 02 90F notcher has been used sustainably in trade and industry for more than 15 years.