Description from manufacturer-
For 1-Inch Diameter Light Bodies, Mod 0 (M-LOK® Compatible)
Fully ambidextrous mounting; either the left or right side of the rail system.
Fits majority of popular 1-inch round body tactical light systems.
Design to mount on the 1:30 or 10:30 o'clock (upper 45 degree) rail positions.
Strong Aluminum construction.
Intently designed to below-profile and snag-free.
Used item, functioning condition.