These aluminum spacers are used to correct the size of the error， tattoo machine work perfectly. Rubber bands assistant clutched the needle stability on all types of coil tattoo machine. Rubber bands to help ensure the needle jumping from mobile / tattoos. It has 3 different sizes universal wrench， can be used for quite a number of tattoo related.                                     Features            These Aluminum Spacers are used to correct the size error to make the tattoo machine work perfectlyRubber bands aide in holding the needle steady on all types of coil tattoo machinesRubber bands help secure the needle from moving / jumping wile tattooingUse Wrench to tighten and loosen the screws of your tattoo grips3 different size allen wrench which can be used for pretty much tattoo related                                                                                                Package Includes            50 x Rubber Band50 x Shockproof O-ring50 x Needle Grommets Nipples3 x Wrench10 x Aluminum Spacer