Multi-Function Rotary Kit: 3-in-1 design handles engraving on bottles; cups; spheres; rings; bracelets; and moreclamp; prop; or hex stud for different shapes and diameters No Installation Needed: Pre-assembled for fast setupsimply connect to your machine and start engraving immediately Compatible out-of-the-box with Falcon/Falcon2/Pro series; see A1 note below