I just fired this thing up for the first time last night. Based on other reviews, I want to address a couple things. It is variable speed. The water hose provided is a weak point but easily fixed. The barb on the drill accepts 3/8”/8mm ID tube and the thin tubing provided slides off and on. I picked up some braided vinyl tubing, a couple of hose clamps and a garden hose attachment with a 3/8” barb and made my own. I’m guessing the one provided would work short term if you got a couple of tube clamps to hold it on the barbs. The drill did start smoking after my fifth hole. I attribute this to my bit dulling, me pushing it hard, the bit binding in the hole and the drill being a bit under powered. When I backed off the pressure and let the bit do the work, the smoking stopped. If you are buying this thinking it is a thousand dollar plus tool, it is not. For what you get for the price, this is a great tool. I gave it 4 stars because of the hose tubing; otherwise, it would have been 5. Also, when you attach a 9” long coring bit, it looks so cool you will want to hang it above your fireplace.
EEProf 
