The power milling head is a universal power component that is combined with a milling table or a power slide to complement various types of support components to form a combined milling machine in various forms. Shaft head size: diameter 25mm 50mm.Towbar spindle hole: 12mm (not included). Spindle material: 20CrmnTi, carburizing heat treatment. Feedback is very important to us. It is impossible to address issues if we do not know about them! Faction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it's non-workdays, please kindly be patient and wait till Monday.