1 set of tools for lens repair or large format lens retention rings can be easily tightened and loosened,meeting repair scenario requirements Anti-Slip Protections Design Tool heads feature anti slip to scratches on lenses during repairs For Lens flat, semi-flat, pointed 6 screw locking design. anti-magnetic stainless steel, beautiful and durability. Adjustable from 10mm to 100mm to meet most lens sizes Powerful Suction Cup Fixation Features a high-adhesion vacuum cup design to securely anchoring the lens and sliding damage Precise Triple-Head Set Equipped with three specializing heads of different specifications, suitable for disassembly and installation operations on various precise equipment