For this price, this slingshot (spin chuck / slingshot / Fletsche) is a really good offer. If the rubber bands are here of different lengths, so that's no problem at all to bring this to an exactly equal length. The beads used in the ends of the silicone hoses that are used to hold the ends of the tubes into the conical holes of the slingshot can be moved easily between the fingers by gently squeezing, forward or back, thus creating an exact uniform length on both sides of the spinner. So those who have the faulted here, please times a little bit to think, then it works already! The slingshot is well in hand. Any sharp edges of the metal body can also slightly eased with fine dry sandpaper, if that becomes necessary. I'm perfectly happy with it.