High Compatibility: Designed to be compatible with multiple socket brands, our 8PCS magnetic socket organizer set holds up to 199pcs metric and SAE standard & deep sockets., simplifying sockets management, keeping the workspace clean and ensuring you won't lose any sockets. (Note: Sockets are not included.) Professional Design: Our socket organizer holders feature 2 colors: blue for metric and red for SAE. The set includes 199 slots, suitable for SAE sizes from 1/8' to 5/8' (1/4' drive), 2 sets of 1/4' to 1' (3/8' drive), and 3/8'' to 1-1/4'' with a 1/2'' drive adapter (1/2'' drive); metric sizes from 4 to 14mm (1/4' drive), 2 sets of 6 to 20mm (3/8' drive), and 10 to 27mm with a 1/2'' drive adapter (1/2'' drive). Strong Magnetic Base: Featuring a robust 5mm thick magnetic base composed of ferrite and CPE, our socket organizers for toolbox provides strong, stable attachment to metal surfaces, keeping sockets trays firmly in place without slipping