Debbie: I think the ruler/cutter set you are talking about is by TrueCut. They also have a rotary blade sharpener that seems to really work! I bought the ruler because it has slots in it where you can get a pencil in to mark grids, start/stop points, etc. The ruler has a lip and the rotary cutter has a matching part so the rotary cutter "rides" on the ruler. It helps with accuracy, other cutters can be used with the ruler. The best thing I have found to hold the rulers steady comes from Australia, RuleSteady made by KeepQuilting.com.au It is a plexiglass platform that has an upper portion that goes over the ruler, a lower section with non-skid feet that stays on the mat, a ridge that keeps the ruler from sliding, and a long handle on top. It is about $40 but it was a Christmas present and well worth it!