- This kit includes 3/8 inch (10mm) Acme thread press rod sized for headset installation, a pair of interchangeable Liner Quick Handles, a quick-action 3/8 Zipnut, and a full complement of the most common guide sizes to ensure efficient and accurate headset installation - Utilizes the same 29 degree angle Acme thread design found in high precision applications such lead screw drives for CNC machines - This design results in wider and broader thread bases which have greater strength and overall durability - This thread design is much more accurate than standard V shaped threads, providing exact 90 degree force for perfect bearing seating and installation alignment
