The Lot Of 5 Lucky Line 40501 Secure-A-Key Slip On is a set of access control devices designed for use in commercial and industrial settings. These slip-on covers are specifically made by the Lucky Line brand to secure keys and prevent unauthorized access. Each package contains 5 individual Secure-A-Key covers, perfect for maintaining security in facilities or businesses that require strict access control measures. The model number 40501 indicates the specific design and functionality of this product, making it a reliable choice for those looking to enhance their security protocols.