The Self Centering 4" Wood Lathe Chuck Set by aigo888 is a heavy-duty power lathe chuck made of steel, weighing 4.98kg. This chuck set features 4 jaws for secure gripping and turning of wood, with a size of 1" x 8 tpi. Perfect for woodworking enthusiasts and professionals, this set offers precision and control for various woodworking projects, making it a valuable addition to any workshop.