PROFESSIONAL WATCH MAINTENANCE TOOLS: Professional Watch Maintenance Tools is useful for watch repair works 8 SIZE OF GROOVED CHUCKS: NO.0--18.50mm NO.1--20.20mm NO.2--22.50mm NO.3--26.50mm NO.4--28.30mm NO.5--29.50mm NO.6--33.50mm --36.50mm FITMENT: Suit for /for UDOR/for OTHER Using the same rotary incisor as swissi, it can maximize the accuracy of the teeth and the high-grade pearl nickel plating effect. Type:Watch Wrenc Opener Removal Set Condition: 100% New Colour:As Shown Material:Titanium alloy Package Contents: 1 x Wrench 8 x Grooved chucks Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.