Notes: 93-4907 SLOTTED SET SCREW UNI5929 M12X25 45H is original ZETOR product. 93-4907 SLOTTED SET SCREW UNI5929 M12X25 45H1 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849