100% modular and expandable tool organization. One kit holds 15 wrenches, but connect and add more as needed. holds wrenches from 5/32" (4 mm) up to 1-1/2" (40 mm) vertically. saves around 30 to 40% of toolbox drawer space. Strong magnets on the base hold the organizers in place in the toolbox drawer. Magnets work with thin drawer liners. Hand tool inventory is super-fast and easy with the orange missing tool indicator stripe. See any orange? Then you have a missing tool. That simple. A vertical wrench can connect to screwdriver and plier organizers. Simple and effective tool organization. Mechanic and Veteran Owned Business lifetime warranty and 100% customer satisfaction. Patents, PCTs, and trademarks pending or approved.