It's frog is much larger giving a greater distance between the hair and the stick. It is held with an underhanded grip. The bow should be held with the left hand while formulating the bow hold. Hold the palm open - faced up with thumb extended. Lay the bow in the palm with the adjusting screw extending back behind the thumb.
Knuckles are bent.
The same as above only not keeping the knuckles bent - which puts the flat fingers in contact with the bow instead of the tips of the fingers. This pressure applies the weight of the arm to the bow. Fingers, wrist, elbow, and arm provide flexibility. Must be able to recognize when a perfect unison is in tune. Must be able to play harmonics.