I used it to add a T-slot to the profile. The hard rubber tip that came with the kit was effective and did not damage the aluminum. I was happy with its capabilities and could think of other uses for it. It's doable with magazine air, I only found it a bit aggressive once or twice. It's a little heavier than I thought it would be, but it can still be held in one hand. It's a good idea to buy a thinner and more flexible hose, even if you just put it on the end of your regular hose. I put it on the table and our stiffer magazine tube lifted it so it was facing down and it started bouncing all over the table. We laughed until the thick black marker exploded. It's relatively safe as you can press it against your palm and it won't hurt you much, but if it accidentally wobbles and catches your leg you'll feel it. It was the lowest price I could find and didn't disappoint. I will buy other heads for more uses, I haven't changed the tip yet but the circuit looks pretty straight forward.
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