Cooper Power Tools' Apex u-Guard line of power tool sockets, extensions, and bit holders encased in a protective skin prevents costly product damage on assembly lines during the fastening process. The line gives manufacturers a new weapon against In-System Damage (ISD), chips, scratches, dents, and dings that occur during product assembly. ISD can cost a single assembly plant millions of dollars each year in time, labor and product rework. The protective skin is made of an elastomer blend that is soft enough to protect assembled products from damage caused by incidental contact with swinging tools, yet tough enough to resist punctures and endure shift after shift of operation with minimal wear. The elastomer skin also exceeds the limitations of nylon-based cover material, making it suitable for use in bodywork (pre-paint) applications. The line offers the tight tolerances and delivers an exact fit with the fastener. Each tool features a unique "free-spinning" design that allows the molded skin to rotate independently of the socket, bit, or extension spinning inside, so workers can grip the skin and avoid potentially harmful contact with the contained tool. This enhances productivity, reduces worker fatigue, and protects against potential safety hazards that result from rotational friction.