10Pcs Female M4x20mm Carbon Steel Screw Post Silver Belt Buckle Binding Bolts Leather Fastener Fit for 3\\16 (5mm) Hole Dia

Applicable Hole Dia: 5mm/ 0.20 ; Male Thread Size(Screw): M4 x 8mm(D*L); Female Thread Size(Base): M4 x 20mm(D*L) . Installation: Make a hole within 0.5mm larger than the diameter of the female rod put the screw and nut on both sides of the locked object and select the appropriate tool to lock it. . Easily Used: Used with a screwdriver. The threaded post lets you open and re-attaches the piece where needed . Advantage: Precision mechanical thread made of carbon steel material anti-rust. They are an important addition to any leather clothing or accessories.