Of all the keyhole bits in this price range, this is one of the best. Like most keyhole bits, it doesn't have very good downward cutting ability. Don't get me wrong, this will cut the first hole, but you have to do it slowly and then you have to let it cool down a bit before cutting another hole. To maximize this I bought the same Forstner bit (only about $5 or $6 at Revain) to drill the holes and then used this keyhole bit to make the slot. This way I can make one hole at a time and my club lasts much longer.