I bought the Invisigrip to put on the underside of my large, clear plexiglass rulers that I use for cutting quilting piecing and strips.  No matter how much pressure I put on the rulers, I seemed to have some slippage as I cut the fabric with my rotary cutter.  I am a quilter and really want my cutting to be as accurate as possible.  I was pleased that this product was both easy to apply and works!  It is clear so I can still see through my ruler for cutting guidelines.  It was also thicker than I expected, and so was very easy to cut and apply to the underside of my ruler.  It is made of soft plastic sheeting that adheres to the rulers without sticky glue or adhesive, and you can easily peel it off and put it right back on again without leaving any residue.  But best of all, it really does help my rulers stay in place and not slide around as I cut.  I recommend this product!!