기능

• A hexagonal wall, three rollers, an internal cage, and this delicate balance of gripping, tightening, and loosening the coaxial stud bolts is a complete change from the previous work of rubbing with a separate shaft.
• Grasp all screws tightly.
• The triangular structure has been changed to a hexagonal shape to tighten the chuck range (tolerance). This improves durability and reduces the burden placed on internal components.