This is a top quality 316L stainless steel 4mm wide tongue. Obvious 90 degree edged angle and layer requires advanced sharpening techniques. 4mm tongue is fastened by screw instead of spring bar. Item no. : NT-ACC-RG22-060BL Buckle size : 22mm (Strap Buckle size) Buckle type : Screw Type, 4mm Tongue Style Thickness : 3.0 - 4.0mm Overall Size : Not applicable Material : 316L Stainless Steel, Solid Color / Finish : Sandblasted Net Weight : approx. 8g .