Features:Lockable – Via Padlock (Not Included) For Added SecurityHeavy Duty Metal Front Latches – increasing strength, durability and longevityMetal-Pin Side Latches – allowing TSTAK modules to be connected together. The metal pin design provides longer lifeIP54 Waterseal – Providing Water And Dust ProtectionTelescopic Handle – For Easy Transportation Of Heavy Tools. It Also Conveniently Slides Back Into The Toolbox Body For Easy Storage7 Inch Durable Wheels – Allowing heavy tools to be transported easily across longer distances