These rods are made of high-strength, clear, anodized aluminum for lightweight, rugged, dependable operation. They will not rust, split, splinter, swell or warp in any environment. They feature heavy-duty matte-textured mylar tape faces and have oversized heavy-duty brass locking grommets coupled to a two-layer tape face; detector rail is black high-density plastic; UV stabilized for long life; solid tape lock with internal brake slide; tape lock pin cannot puncture tape; and Dupont nylon parts. Laser and optical rods available, 10", 15", 3 and 5 meter, lengths with 10th and 100th meters or cut-in-fill faces. Laser Detectors brackets will fit most MFG. Detectors, call for info.