5 Piece Impact Socket Adapter Set, 1/4, 3/8, 1/2'' SAE Socket Adapter, Impact Driver & Wrench Conversion Kit, Cr-V Steel Socket Reducer Locking Socket Adapter Set Color: Red Quantity: 5Pcs Type:  A: 3/4 to 1/2 B: 1/2 to 3/8(fly large to fly medium) C: 3/8 to 1/2(medium to large flight) D: 3/8 to 1/4(fly medium to fly small) E: 1/4 to 3/8(small to medium flight) Material: Chrome vanadium alloy steel Item Size: Type A: 4.9 * 2.6 cm / 1.92 * 1.02 inch Type B: 3.7 * 1.8 cm / 1.45 * 0.7 inch Type C: 3.8 * 2.2 cm / 1.49 * 0.86 inch Type D: 2.5 * 1.4 cm / 0.98 * 0.55 inch Type E: 2.7 * 1.7 cm / 1.06 * 0.66 inch Package Size: 15.5 * 13.5 * 3.5 cm / 6.1 * 5.31 * 1.38 inch Package Weight: 330g / 11.64oz