Titanium alloy is one of the special metals that is extremely stable, lighter, stronger, never rust, and it must to be used in the fields of aerospace craft andmedical artificial bone. All parts of STRADPET titanium chinrest clamps /screws are made of titanium alloy. They were ergonomically designed for the violin players more comfortable. No any plating, no any coating, skin will not be stimulated to lead allergies. They are really healthy products.