Toolex SSJ4000 Vise Jaw Sets; Jaw Width (mm): 101.6; Jaw Width (Inch): 4; Set Type: Component Kit; Material: Aluminum; Vise Compatibility: 4" Vises; Jaw Height (mm): 38.1; Jaw Height (Decimal Inch): 1.5; Jaw Thickness (Decimal Inch): 3.94; Hard or So