will not replace the actual activator [SEP] i use the activator on some of my patients in practice and was looking to get an additional one as back up i thought i would give this a try since it was a fraction of the price of the actual activator however in this case you get what you pay for when i first held it in my hand and tried using it it felt very light and flimsy i have been using the same activator for over years and it is still working great this feels as though it will fall apart in a year if i am lucky also on the handle that rests on my palm there is a black encasing around the metal however for some reason intentionally or not i am still not sure the encasing is not smooth and overlaps right in the middle of the handle after only one click of the activator this poked into my palm and was very uncomfortable i cannot imagine using this more than a couple times without hurting the tendons in my hand if you are a doctor of chiropractic and you are trying to use this in lieu of the activator do not do it in this case it is worth the extra money to get the original