CutterPillar LED Clamp Light This new clamp gives you significantly more leverage on your ruler by holding with your arm versus your hand/fingers. Cuts will be much straighter and safer with your fingers away from the cutting edge. The LED light is a huge bonus that floods your work area with a bright 100 lumens for many hours with its USB-C rechargeable battery. It has a low-high brightness toggle. How to use: This clamp was designed for rulers only, not as a support handle. The clamp's suction works best on smooth, flat, clean surfaces. The light has two brightness settings. The clamp can lift rulers up to 5 pounds. The light charges in 4 hours or less. Over charging may reduce battery life. Store in room temperature place. Clean with a damp cloth. Do not immerse in water. Includes USB-C charging cord. LED indicator lights show battery level.