Our Standard Set accessories now come in Tough Case + system, the latest addition to our accessory storage line. The Tough Case + system is a connectable case system designed to optimize storage space and keep your bits organized. The patented bit-bar design allows for easy bit removal and the clear lid allows you to see inside at a glance. Our Standard Set accessories now come in Tough Case + system, the latest addition to our accessory storage line. The Tough Case + system is a connectable case system designed to optimize storage space and keep your bits organized. The patented bit-bar design allows for easy bit removal and the clear lid allows you to see inside at a glance.