This handy, nasty little device should be part of anyone's S&M toy bag. A real 'Intensifier' to any scene when you 'gently' roll this sharp pointed wheel over a sensitive area of the body. Gentle is the operative word here, as the weight of the wheel itself is all that is needed to feel the points. Use it gently, because very little pressure is necessary to get the right reaction from your playmate. Our Neuro Wheel is a genuine medical device to check on a person's nerve sensitivity. This is not a dull 'pattern tracer' but a very sharp pointed steel wheel that rolls smoothly across the skin. Inner thighs, genitals, & around the tits are just a few of the places to use this on. Best to clean with alcohol or Cavicide before using in case you do break the skin. Use with caution. We love this toy.