SR tools HTC Superfloor™ in a museum HTC's resin-bond diamond tools are many times used after the use of metal-bond diamond tools for floor polishing. However, in some cases a resin-bond diamond tool can be used as a starting tool on smooth flat floors. Soft floors Floors of loose or porous material. A high rate of removal is achieved with these floors, but with higher tool wear. Medium-hard floors Normal building concrete. This includes marble and terrazzo floors. Hard floors Usually refers to steel trowelled floors or certain types of cement. This includes granite. The floors usually require “soft” segments.