The TL-1 is a Laser Dumpy Level with a visible diode laser. This precision instrument is extremely accurate, and is used where a reference spot can be physically seen. It is also useful where conventional optical levels are not efficient due to poor light, or in indoor situations. The TL-1 has tilting capabilities if required.The laser has a full metal construction of the finest quality. The TL-1 also incorporates a fine adjustable laser beam to a dot as small as 0.3 mm diameter at 5m to 5mm dot at 100m.