This is an old post but still important. I use Quilter's Slide Lock. I use the shorter one the most but have both sizes. I use it on top of the ruler. I bought my first one from Australia when it was called Rule Steady. Now a US company has the rights to it and it's Quilter's Slidelock. I don't cut without it. For small rulers and templates I use the small round Gypsy Gripper. When I'm cutting away from home I use a glove. Not using a safety device when using a rotary cutter is like driving a car with no seatbelt.