Starrett A17-38E Locking Arbor with Extra Long High Speed Steel Pilot Drill 8.75mm / 11/32" Hex Shank

Fits hole saw sizes 32 - 210mm / 1.1/4 - 8.9/32".
Arbor locks tightly on the saw eliminating vibration with extra length high speed steel pilot drill.
Invaluable on exceptionally tough jobs and production runs.
Recommended for use with specific Deep Cut hole saws (DCH).