If all you're concerned about is the end result, there are a lot of irons out there that will do the trick, however...the ease of use, and by default the lower chance of a screw up come from higher end tools. With irons its a matter of pulling them out of the leather as much as it is going through the leather. If they stick, things stretch when you pull them out. The make what should be good holes ugly. Crimson Hides are pretty good, but KS Punch are better. They are a bit spendy, but they are sweet. Also, you have a choice of slits or diamond holes like an awl would leave. The choice is totally up to you. Both will yield a pleasing stitch provided you're doing your end of the work. Buy a good awl, you'll still need it on occasion. I like the ones made by LederLouis in Switzerland. Not too expensive, but super to use and the leave a perfect hole.