QR Code Link to This Post Large Radius Dapping Block total width 3.5" steel. You choose 1 of 4 radius sizes of 3", 4", 5", 6" or buy them all for $140. (check 2nd and 3rd photo to calculate size needed) I make them a few dozen at a time in my shop using 12L14 machine Steel & Hardwood Forming Dowels. Custom Sizes Available (Photos) in Steel and Wood. Check out the step by step construction videos of this and other projects on youtube: https://www.youtube.com/watch?v=dnnzPDUh5EEWith a complete machine shop, I also fabricate and machine projects for inventors, artists, motorcycle and auto enthusiasts. I can repair or rebuild irreplaceable machine parts for antique or hard to get items. I can pour new Babbitt journals. Got a sculpture project that needs some welding or machine work? I can drill a simple hole or work from a CAD drawing.