445nm 2W Ultra High Power Blue Laser Pointer Best Selling 2000mW Laser

Decent laser for the money. However a few wraps of teflon pipe thread tape on focusing threads does wonders to tighten up the loose fit. Divergence is bit large. Good Deal for the money though. Also, use good 16340s, current draw is high @ 1.4-1.5 Amps.