Miniature Worm Gear ClampsMeets or Exceeds SAE J 1508 Type M1/4" Hex Head Slotted Screw5/16" Wide Perforated BandThis American Style Micro Gear Clamps materialsW4: All made of AISI 300 Series Stainless SteelW2: Band & Housing made of AISI 201/ 301/ 304 SS; Screw made of Zinc-Plated SteelW1: All made of Galvanized SteelSizes for Miniature clamps belowInches (Inch)                      Metric (mm)7/32 to 5/8                            6- 165/16 to 7/8                            8- 227/16 to 1                              11-251/2 to 1-1/16                        13-279/16 to 1-1/4                        14-3211/16 to 1-1/2                      17-38 7/8 to 1-3/4                          21-44