This heavy duty key-ring extends quickly and smoothly to provide 36” of reach and is of a high quality. The retraction force is 13-15oz, which is 50% higher than the S48K type. The cable is made from industrial strength Kevlar® cord and the robust case is manufactured from corrosion proof polycarbonate. A unique ball and socket connection enables the S48-SDK to be locked in the retracted mode, making it suitable for carrying heavier attachments such as tools and heavy duty torches. The clip on the back of the case fits easily over a belt or waistband. Black finish.