When designing this product, we had one thing in mind: Versatility. The Fly Tying LED light can be adjusted 360 degrees. It can be attached to a vise or a base. The light clamp can be used with a variety of small flashlights or LED&';s. Includes LED light and mount. Features:~ Replaceable LED~ Adjustable and easy to use~ Fits base or stem of vise~ Light is powered by Three (3) AA Batteries