The Silver Bullet Laser 
What's Included:
M140 445nm 1.3W Blue Laser Diode pressed into a 12mm aluminum module
Multimode 20mm Laser Driver (High, Medium, Low, Strobe, SOS)
3 Element Great Divergence lens
Polished aluminum heatsink
Durable aluminum construction throughout
On/Off clicky tailcap
Nylon knitted wrist lanyard
Requires 2 - 16340 or 18350 Batteries, positive towards laser
Specifications:
Weight: 80 grams (without batteries)
Length: 135 mm
Diameter: 23.75 mm