Agape Alloy Bicycle Water Bottle Cage / Holder with Screws (2 Pack), Black LIGHTWEIGHT HEAT-TREATED ALUMINIUM ALLOY : High quality material and manufacturing for extra strength and durability yet lightweight 4 X M5x1.2 SCREWS INCLUDED: No need to go looking for the right screws. The included screws are standard size for mounting bicycle water bottle cages EASY INSTALLATION: Use a 4mm hex key (NOT included) to fasten cages in threaded screw holes on frame. FITS MOST STANDARD SIZED WATER BOTTLES LIFETIME WARRANTY: This product is covered by Agape's Lifetime Warranty