It allows the tube to reach the fitting stop uniformly and helps the seal contact a consistent outside diameter.

Scissors can flatten or deform flexible tubing. A purpose-designed cutter gives more repeatable perpendicular cuts.

It is intended for common PU, PE and nylon pneumatic tubing. Verify the particular tube size against the tool before use.

Not if the tube is scratched, undersized or incompatible with the seal, or if the fitting is damaged. Inspect all components.

Yes. Isolate and depressurize the air or vacuum circuit before cutting or disconnecting tubing.