At first it seems odd but if you saw how it is designed it will make sence. The Throttlemiester is manufactured with a double or tripple lead thread (internal workings) similar to a milk jug lid that has a lot of liniar movement versuse rotational movement. In a nut shell it moves in and out about an 1/8th of an inch with a 1/4 turn from the operator. This linar movement is used as a "friction" brake for the throttle grip itself, giving it some resistance from tuning or "locking" it in posision. The word "lock" is missleading on these things, you are still able to manipulate the throttle position when the miester is engaged. The "ON/OFF" rotation of the miester is in unison with the throttle itself. As you rotate the throttle "ON" you can rotate the miester on in the same movement. The same applies to the "Off" as well. I would like to add that the friction does not ever hinder your control of the throttle ever.
They do cost a few bucks. They are made from brass and stainless steel, no plastic crap, just good old fashion craftsmanship. You get what you pay for, and in my opinion they are worth it.
Plus they look nice. :cheers