Sample Pictures 50mm dia hole thru + 10mm x 741mm blind offset hole Multi-size hole drilling 2 holes 23mm dia x 3300mm thru Cooling holes in mold 16mm dia x 3500mm thru hole Pattern of 16mm dia blind holes for water cooling Cooling jackets for furnaces , long holes intersecting with cross holes, 32mm dia. 8mm dia hole x 286mm in 16mm dia 316 stainless steel 6mm dia hole x 1000mm thru in 12mm dia 316 stainless steel