1There are four types of international standard to support different type of measurement. 2U.S Size: NO.1 to 14(US), Japan Size: NO.1 to 32(No), Hong Kong Size: NO.8 to 32(No), European Size: NO.41 to 74(U - Circumference). 3Detachable T-shape rotary handle, it can be detached by rotating anti-clockwise direction besides detached it can save storage space. 4It can achieve best result for hard metal such as Platinum and Platinum K. 5This hand-operated ring stretcher is a compact yet powerful tool for enlarging rings. Features:1. There are four types of international standard to support different type of measurement. 2. U.S Size: NO.1 to 14(US), Japan Size: NO.1 to 32(No), Hong Kong Size: NO.8 to 32(No), European Size: NO.41 to 74(U - Circumference). 3. Detachable T-shape rotary handle, it can be detached by rotating anti-clockwise direction besides detached it can save storage space. 4. It can achieve best result for hard metal such as Platinum and Platinum K. 5. This hand-operated ring stretcher is a compact yet powerful tool for enlarging rings. Specification:Condition: 100% Brand New Material: Metal Color: Black and Silver Size: Approx. 30.5cm/12.01in Package List: 1 * Ring Stretcher 1 * Handle