Lumax LX-4843 Gold/Silver 6mm x 1 and 8mm x 1 and 10mm x 1 (Metric) 100 Piece Grease Fitting Assortment Passivated finish for maximum protection from corrosion Heavier wall thickness for extra strength Stress relieved and tempered carbon steel spring Ball check in head prevents dirt from getting in Includes two installation / removal tools