A positive rake blade (POS) is advisable when the workpiece is taken to the saw blade. A negative rake blade (NEG) is advisable when the blade is taken to the workpiece.
Alternate Top Bevel (ATB) The most common circular saw blade tooth formation. The tips are ground to alternate between a right and left hand bevel. This tooth configuration gives a smoother cut when crosscutting natural woods and veneered plywood. The alternating bevelled teeth form a knife-like edge on either side of the blade and will give you a cleaner cut.