This is a very mean dart It weighs 11 gram, 14cm long (without the fletching) blade is sticking out by 5cm. I haven't even pulled back to 70% length of my bandset to make it go through this 2cm thick pine board. I didn't want to shoot it at full force because it's already very hard to pull it out of the board. The blade was cut out of a circular saw blade with an angle grinder, the shaft is a 1cm thick beech dowel. The "fletching" for lack of a better word, is a piece of shoelace just shoved in a drilled hole in the back of the shaft. The steel is pretty mild, it bent a couple of times when shooting but that's ok, at least it didn't break. Also harder steel would take longer to cut and sharpen. If I would do anything more to improve on this design, I would stick another nail in the blade, it's not wobbling after 15 shots but just to be sure. Maybe make the blade a little longer.