ToJane Metal Swing Arm Desk Lamp,Heavy Based Architect Table Light for Studio/Office,with Extra C-clamp Mount,Gray Stable,full metal structured lamp,grey painted finish,ensure a long lifespan Adjustable direction,4 Springs balanced swing arm,rotatable lamp head,get any position it needs to be Dual-use,round metal base,firmly established + extra clamp,mount anywhere Bulb include, E26 screw 7w LED bulb for free,equivalent to 40W incandescent Easy to assemble,fix the springs and bulb,plug in base or mounted the clamp well,quickly ready for reading/sewing/drafting/drawing 8 holes on the top of lampshade function to radiating, it will not hot afte long time using. 0.6mm thick metal structure,overall casting molding tech, finished with 3 times painting &amp; roasting, mould proof, rust resistant, make sure a long lifspan. twin-arm will extend up to 32&#034;, which make sure a large lighting area. 4 springs balanced arm,3 rotatable joints, flexible to set any light postion that you like.