I'm using the flat end of a 5lb maul with this device, and I love it. For the first time I can easily and safely split logs down into kindling of a size that make starting the woodstove very quick and easy. I love that the design does a decent (not perfect) job of holding the log in place for, so that my hands can hold the maul. Some logs take 4 or 5 whacks before they split, while others split first try. I don't have to swing the maul very hard... usually my first try is a light tap, which either splits it or sets it in place better. My second swing is a little harder, and if that does not do the trick, my third swing is a little harder yet. I never lift the maul head higher than my shoulder, and never give it more than what I would consider a medium swing. I have NOT needed to secure the bottom so far. Great product.