By popular demand, we have now introduced our 2nd generation lensplate for our Big-Glass customers. Specifically designed to fit monster-sized lenses like the 400mm F2.8, 500mm F4 and 600mm F4, this 7" long Arca-Swiss compatible plate gives you loads of fore-aft adjustment to balance your camera and lens. Specs: Length: 7" This plate comes with both one (1) 3/8" mounting bolt and two (2) 1/4" mounting bolts. NO Bushings are required. 2 Allen wrenches (1/8" and 5/32" are included). 2 Dead-stop bolts prevent sliding out of the Quick-Release Clamp. Hard anodized, sand-blasted finish for years of life. Drilled for fitting most popular flash brackets.