DescriptionSecuFast Seclock M12 x 20 BH A4 Features SecuFast Seclock M12 x 20 BH A4 Type of screw Machine screw Head type Roundhead Diameter 12 Lenght 20 Material SS A4 Bit SL-M12 Related products SecuFast Seclock Bit M12 SecuFast Seclock Bit M12