The tool looks good but looks can be deceiving. When the bits are fully seated in the holder and secured well, of the 5 bits, 2 came out of the holder when turning the aluminum bar, and 1 came out and stuck when turning (easy to machine) mild steel. With steel, the lower part of the holder hit the steel rod and grew. Mine may have skipped the heat treating step, but I'll never know. Very bad purchase, not recommended.