Since our main objective is eventual self care and of course prevention, we often mention trigger or pressure points,the index knobber comes with a chart of various trigger points. A number of therapists use these techniques and even though they prefer the feel and pressure of one's own thumb, very often you just get tired or don't have the strength to use enough pressure. The Index Knobber® is probably the simplest pressure point device on the market however, it is our favorite. It is made of wood, easy to hold with one knob. The Index Knobber® retails for $8.95.