You must use it in exercises with a certain strength. I tried to use it in a smaller 12v drill bit and it maximized the effect of the drill bit. I have a Kobalt 24v drill bit, but it works fine. Also make sure to use the side handle for your drill bit, otherwise you may twist/break your wrist. In addition, any plug-in drill may workTip 2-U.S. shippingDon't drill into the center of the log. Drill holes on the edge of the log to make it easier to split and help prevent tools from getting stuck. 3-U.S. shippingAvoid knotting like the plague. If you try to tie a knot, it will get stuck.Tip 4-U.S. shippingIf you drill on the left side of the log/wood, it will use the rotation of the drill bit. If you are drilling on the ground, place your knees or feet on the log to prevent it from rotating, or you can tilt it slightly to make it rotate into the ground. The best case is that you have a table/station that you can use, and maybe even a built-in stop.Tip 5-U.S. shippingIt is best to split the separated logs into smaller fire or smaller logs to load into a small stove. I don't have a heavy hammer drill to test its operation on larger logs. It is very effective for what I need.