Angle of the cutting edge of a broach tooth. Sometimes called the "hook" angle forms one part of the cutting edge.

the position of the club face relative to the intended line of ball flight. A square face angle aligns directly at the target, an open face aligns to the right, while a closed face aligns left. (Assuming right handed golfers.)

Position of the club face relative to the intended line of ball flight. For right-handed golfers, a square face angle aligns directly at the target; an open face aligns to the right, while a closed face aligns left.