Description: This magnetic socket inserts will firmly hold your fasteners (such as nuts) in the socket, preventing them from falling into hard-to-reach areas, making installation and removal easier. Application: Hexagon outside, works on both standard and deep socket. ( 8mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8") Easy to Use: Easily identify SAE (Green) and Metric (Blue) magnetic socket inserts with different color-coded. All marked with the corresponding size. Package Include: SAE Sizes Include: 7/8", 13/16", 3/4", 11/16", 5/8", 9/16", 1/2", 7/16", 3/8", 5/16" Metric Sizes Include: 19 mm, 18 mm, 17 mm, 16 mm, 15 mm, 14 mm, 13 mm, 12 mm, 11 mm, 10 mm, 8 mm.