Fillets commonly appear on welded, soldered, or brazed joints. All the elements usually brazed together using controllable atmosphere brazing process. Larger motors have aluminium or copper bars which are welded or brazed to end-rings. The rear is firmly fixed to the bottom triple clamp (usually brazed or welded). An insert of tungsten carbide is brazed into the steel to provide the cutting edges. The parts can then be soldered or brazed conventionally. Brass bodies are often soldered together, while keywork and braces are most often brazed. Small mechanical parts are often soldered or brazed as well. The heads of the rivets are frequently brazed or soldered to prevent tank leaks. It was constructed from two machined rings that were weld-joined to a brazed honeycomb panel. The outer structure was made of stainless steel brazed-honeycomb brazed between steel alloy face sheets. Another common artistic use is the construction of sculpture from welded or brazed nails. Uncoated tips brazed to their shanks were the first form. Larger commercial versions use gaskets between the plates, whereas smaller versions tend to be brazed. Additionally, dissimilar metals and non-metals (i.e. metalized ceramics) can be brazed.