These glasses will protect against laser beams with the wavelengths from about 180 to 550 nm. This means the laser will protect against green, blue, violet and ultraviolet lasers. It has an OD of around 3.
Using glasses like these to protect your eyes while using your laser is absolutely neccessary if you value your eyesight.
WARNING: Although these glasses will protect against accidental exposure, the user must still be cautious. Do not expose the glasses for high powered lasers intentionally, the plastic will melt. Be aware of the possibility that beams might hit your eye from the open sides via reflections or third party users.