plural of seed drill

A drill with a central pin or projection to enter a hole, for enlarging the hole, or for sinking a recess for the head of a bolt, etc.; a counterbore.

A heavy drill consisting of a bit powered by compressed air, used e.g. for breaking tarmac.

plural of pneumatic drill

A machine tool for drilling slots, in which the work or tool has a lateral motion back and forth. / A drilling machine in which the spindle holder can be adjusted laterally.

plural of tip drill

(basketball) A practice drill where a line of players improve their rebounding skills by catching a rebound in the air, tossing the ball back against the backboard before landing, and returning to the end of the line to go again.

plural of mill drill

plural of drilling rig

A hand-held drill powered by electric motor.