Been using my (low power) laser finder on my scopes for years.
Much better and easier to use.
You can get a bracket off ebay to suit most scopes.
Something like this, comes with a locking ring for the power button:
Laser Pointer Bracket for Telescope Dovetail
As stated, always use caution and obey local regulations.
Cheap green 532nm lasers usually emit dangerous IR because they lack the proper filters (you get what you pay for) so be very careful, the invisible IR can be dangerous to your eyes (as too is the visible laser beam >5mW).
Also the cheaper lasers from ebay can't be trusted on their power claims since a lot are much higher in power output and illegal to use in Australia.
Only way to be sure about the power output is to use a proper Laser Power Meter since it's very difficult to estimate the output power just by looking at the beam.
