DescriptionSecuFast Cinstar M4 x 20 FH A2 Features SecuFast Cinstar M4 x 20 FH A2 Type of screw Machine screw Head type Flathead Diameter 4 Lenght 20 Material SS A2 Bit #1 Related products SecuFast Cinstar Bit M4 SecuFast Cinstar Bit M4