Load & Unload Magazines Fast; Saves Overworked Fingers & Thumbs Tough, lightweight, reinforced, black-polymer loader/unloader saves fingers, thumbs, and wasted time; lengthens magazine life and lessens wear and tear on magazine lips. Staggered, triangular pieces of plastic securely grasp rounds for effortless loading/unloading when you move the lever back and forth. Fits in your pocket. SPECS: Reinforced polymer. AR-15/M16 - Fits 10, 20, 30, 100 rd, .223 caliber magazines.