US Patent 9545716 End piece of a tool suspension rack

An end piece of a tool suspension rack is mounted onto a distal end of a metal rack of the tool suspension rack. The metal rack has at least one slide structure formed thereon for slidably multiple tool holders, wherein at least one distal end of the metal rack has an end piece mounted thereon. The end piece has a groove structure defined therein for allowing the tool holder passing through the end piece such that the tool holders is slidably mounted on the metal rack. The groove structure has a curved protrusion formed on an inner periphery thereof to prevent the tool holders, which are slidably mounted on the metal rack, from accidently detaching from the metal rack.