Weldon 97610-00-W Solid Pilot Counterbore: 1/2" Dia, 21/64" Pilot, 2 Flutes
Solid Pilot Counterbore: 1/2" Dia, 21/64" Pilot, 2 Flutes 5/16" Socket-Head Cap Screw Compatible, 5/16" Shank Dia, 3-3/4" OAL, High Speed Steel
$73.79