This C-shaped lamp clip is designed for very heavy duty applications. I was looking for something that would take the Steelcase Dash Lamp's heavy round base off my desk. This clamp is strong enough to do just that! I ordered some metal rods (Glarks, 18pcs, Stainless Steel Round Torsion Bar, Craft Tool Assortment, 2.5-8mm diameter, 100mm long) to ensure the diameter for the Steelcase Dash Lamp is 6mm x 80 mm is required. The bar I bought is too long so I added some shims (and can cut the bar later). Ideal! If this C-Clip can replace the base of a 7+ pound Steelcase light, then it will fit almost ALL lights, mics, magnifiers, etc. SO good! (The Steelcase C-Clamp is over $65, with a very long wait.) I'm happy! (I'll add a photo of the lamp with the original socket later.)