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 Cinstar M4 x 50 BH A2 SecuFast Cinstar M5 x 16 BH A2 SecuFast Snake Eyes 3,5 x 38 FH A2 SecuFast Cinstar M4 x 16 BH A2 SecuFast Cinstar Bit M4 SecuFast snake eyes Bit SP-6 SecuFast Tri-Wing Bit W5 SecuFast Cinstar Bit M5 / M6