(Heads may require slight alteration if being fit to some custom bottom metal units.) Each set comes with an Allen wrench. N-70 NEW ENGLANFDoCrUmSoTreOiMnfoGrUmNatSioEnRsVeIeCoEu, rLTwDe.bs•it6e03• .w28w7w.4.8n3e6w•eFnAgXlan6d0c3u.2s8to7.m48g3u2n.•cionmfo@necgltd....