Strauss Ball Pump Double Action PRODUCT STRUCTURE AND NEEDLE : Solid metal screws by the side of the needle EASY TO CARRY: With its compact design, this portable air pump easily fits into sport bags. AIR OPERATION'S : Pumps air on both upstroke and downstroke with un-breakable needle IDEAL USE : Strauss Dual Action Ball Pump works great for your soccer balls, footballs, basketballs, volleyballs & multiple inflatable sports balls.