Product details:

Clamping Range: 1/32"-1/2". Shank Taper: 3MT Morse Tapter #3 Accuracy: 0.005" Self-tightening key-less feature automatically increasing gripping force, high reliability, and stability. Special quenching treated key parts increases durability. Suitable for drill presses or lathes spindle accepts MT3 arbor Product color may various from silver to black.