[QUOTE=Rose_P;6057130]This was probably made for a TV, back when TVs were big, heavy boxes. I have one I use for quilting and it's excellent for that purpose if you can find one. It's rectangular and big enough for a small mat. It does not slide on the table and doesn't tip. They are extremely steady because lives depended on those TVs not falling on anyone!
That makes sense! I had no idea what it was. I paid $3 for it and they had 4 of them. I debated buying all of them. It is very sturdy and doesn't tip at all. It rotates fluidly and it isn't heavy at all. I have the Olfa rotating mat also but I prefer to use this.