Design Features: Exquisite workmanship with fine gemstones. Easy to Use: The knurled nut controls the tension, which is easy to use and saves time. Flexible shaft for easy operation and self-control. The spring action and stretch control limiter controlled by the flexible shaft allow faster switching from one cylinder to another for faster action. Applicable Occasions: Suitable for 19-64mm diameter cylinders used in cars, trucks, buses, tractors, industrial engines, and small air-cooled engines. Specifications: Item Type: Polishing Tool Material: Steel Color: Silver + Black. Range: 1" 3/4"-2 1/2" (19-64mm)