Sockets have FOUR FLATT Sides that deter rolling and are wrench compatible. 90-Tooth ratchet provides 4° of arc swing and a slim profile for work in tighter spaces. Includes: 9/16″- 7/8″ Standard, 10 – 19mm Deep, 19 – 24mm Standard, 15/16″ to 1 1/8″ Standard, 1/2″ to 15/16″ Deep. 3, 5 extensions and 90-Tooth Ratchet.