Description:* Designed with Cr-V steel, chrome plated polish, anti-corrision properties.* Easy to assemble and manipulate, allow to easily tighten and loosen fasteners by hand.* Wide application in DIY hand-making, household maintenance, and most general repairs. Specifications:* Size: 1/4" F to 3/8" M 3/8" F to 1/4" M 3/8" F to 1/2" M 1/2" F to 3/8" M* Female Driver Size: 1/4-inch* Total Length: 25mm / 1-inch 36mm / 1.42-inch* Color: Silver Tone* Material: Cr-V Steel* Finish: Chrome Plated Package Content:* 4 x Socket Adapters