This stanley 3 in 1 tool organiser is made from 2mm polypropylene plastic so it is tough and durable when closed the case has a robust structure that provides durability and security whilst transporting the case has a 15kg weight limit other features include movable dividers that provide specific configuration for smaller parts and or tools and power tools and a central rigid tote that is perfect for hand tools each side is fitted with a polypropylene lid to keep everything in its place