Yes its a little dangerous to falling down. With safety strap or strong double tape under them is a good idea. Also the safer i think is to screw the base down to the floor, but this will damage a little the tiles. Thanks a lot for your help!
Does these placed Screwed up on the base? As i can see the dimensions of RP160 is 42,4Χ22,4X32,7 cm, so i can ask about this in a store.
Thanks for your answers!