Abstract: A lock structure includes an interior body having first and second openings and a cable wire. The interior body is configured to retain first and second ends of the cable wire when in a locked state. The lock structure further includes an electrical sensing device disposed within the cable wire, the electrical sensing device including a first end and a second end, and a signal sensing module electrically coupled to the electrical sensing device only at the first end of the electrical sensing device. The signal sensing module is configured to monitor, via the first end of the electrical sensing device, at least one of electrical and temperature characteristics of the electrical sensing device and selectively generate a notification indicating whether the cable wire is in a tampered-with state or untampered-with state based on the at least one of the electrical and temperature characteristics.

Abstract: A practice band to surround or replace the existing grip of a (e.g., tennis) racket so that a visual indication is provided as to where the hand or hands should be correctly positioned with respect to the grip by a player who is practicing a variety of (e.g., tennis) strokes. According to a preferred embodiment, the practice band is provided with a series of parallel-aligned stripes having different colors to correspond with the different positions around the grip to which the player's hand or hands should be rotated depending upon the stroke to be practiced. The practice band is also provided with printed indicia that is applied over the stripes to identify the different strokes to which the colored stripes of the band correspond.