prestigetiger(TM) 2 PCS Bicycle Bike Cage Bolts Water Bottle Holder Rack Hexagon Screws Total Length: 15 mm Hex width: 2.4 mm / 0.094 inch Thread diameter: 2.8 mm / 7/64 inch (0.11ch) Torx screw set for water bottle cage enhancement Package include:2 PCS Screws