1. Each post is clearly marked for socket size 2. Organize your sockets for quick, easy identification by size and style 3. Post bases beefed-up to hold sockets more securely 4. Each tray holds Shallow and Deep Sockets all in one holder 5. Made of tough ABS plastic that resists oil & grease 6. Fits most U.S. and foreign made sockets 7. 100% Made in the USA 8. 1/2" Trays will fit in a 4" drawer 9. Set holds 172 Sockets Total