"Finger Nail Trial or FNT" This drill can be used to do focus on various parts of the stroke including: balance, hip drive coordinated with arm stroke, breathing on the side, focus on one arm catch/pull, hand entry. Start in the streamline position with both hands in front of you, touching together. Initiate the stroke with one hand while holding the other arm out in front. As you recover the arm out of the water, focus on a nice high (but relaxed) elbow and trail the finger nails through the water.  This can be done as a catch-up style drill but is normally better served as a normal swim. As with all drills, slow, easy, relaxed and efficient is what to look for with this drill: