Modular, stackable large Toughcase, designed for secure storage of accessories. Clear lid for easy bit identification. Easy bit removal and replacement. Extreme SDS Plus masonry drill bits are designed with a Toughcore. The tapered central core increases stability and durability, reducing breakage. Screwdriver bits are designed with an optimised tip geometry for full fitment in the fastener and reduced cam-out. Locking system can be used to connect cases together and securely stack with small, medium and large Toughcases. Attach to a TSTAK for a complete system solution.