with 1/4 "screw for mounting the (laser or other) device
and other options for mounting the L-bracket:
• through a 5/8 "thread which is on the holder and can be screwed onto this screw diameter, eg on a tripod
• using magnets, eg on metal. door frames, constructions, railings, etc.
• it can be fastened to the wall, plasterboard, wooden structure, etc. with a screw / bolt.
• nylon (other) tape for rod, prism, construction, etc.