If you want a throttle lock but vibration is not a concern, this is our lighter size.  If you want conservative styling, this design calls less attention to itself than the Pounders tm.  Some people enjoy the ability to hold their hands a little further out on the bar ends, for leverage (though we strongly recommend against putting more than your little finger over onto the weight, as some fitments are not stout enough to be a good handhold in an emergency). When we recommend it, it is because that's all the mass you need to get the job done.