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Amazon [amazon.com] has CAP Barbell 55 lb Single Adjustable Dumbbell with Contoured Full Rotation Handle, Honeycomb Black and Chrome Handle (SDBAIS-055G6) for $99.00. Shipping is free.

Product Description from Amazon:[LIST][*]ADJUSTABLE – Simply rotate the handle left or right while positioned on the tray to adjust the weight from 10 to 55 pounds in 5 pound increments. No knobs to turn, pins to align, or levers to slide – just twist and go. US Patent 11,285,356