3 Piece Steel Hard Jaw Set For 4″ 3-Jaw K11 100 Lathe Chuck (3900-4742) ~ Set includes 3 pieces. ~ Fits most 3-jaw self-centering lathe chucks with replaceable internal jaws. ~ Top jaws, also known as hard or step jaws, hold a workpiece during an operation. Set includes 3 pieces. Fits most 3-jaw self-centering lathe chucks with replaceable internal jaws. Top jaws, also known as hard or step jaws, hold a workpiece during an operation.
