High Speed Steel Fractional Self Starting, 3 16 in to 1 2 in, 6 Steps ORS NASCO Specifically designed for use in Specifically designed for use in restricted spaces on small diameter Energy control system dissipates force by reducing it into smaller increments and spreading it over a wide area Smooth crown design contains a technically advanced suspension with eight load bearing points to stabilize and balance the hat or cap during everyday wear Single flute cutting edge for greater control through steps Hex shank prevents slipping in drill chuck Also available with (TiN) coating for longer life New SpeedPoint tip penetrates faster than previous Unibits and prevents walking Ideal for drilling holes into thin materials such as stainless steel plastic and laminates