Review on Klein Tools 31902 8-Piece Bi Metal Set by Russ Charmin

This set is an update for our family as our old set (different brand) was boring. The set has a solid construction. Hole saws have chip holes in several places to remove plugs/ensure freer chip movement. Easy to assemble/change sizes. The pins carry the torque and prevent the spindle from turning without the entire saw. Deep enough to cut through multiple studs at once. In a separate comment, it was pointed out that hole saws are not suitable for non-commercial drill bits. I didn't find that to be the case in my case. I have a non-commercial Ryobi drill and a hole saw fits. (see photo) This is my first small instrument and so far very impressed. Overall a great product.