DescriptionSecuFast Cinstar M4 x 40 BH A2 Features SecuFast Cinstar M4 x 40 BH A2 Type of screw Machine screw Head type Buttonhead Diameter 4 Lenght 40 Material SS A2 Bit #1 Customers who bought this item also bought SecuFast Snake Eyes 3,5 x 38 FH A2 SecuFast Cinstar Bit M4 SecuFast snake eyes Bit SP-6