SAE & Metric Socket Set Comes with Lockable Stacking Cases Socket Set 1/2 Drive Has Durable Transparent Lid Sockets Set is Designed with 72 Tooth Quick Release Ratchet 20 Sockets, 1 Extension, 1 Drill Drive Adapter, 1 Ratchet Exceeds ANSI Specifications Removable internal Tray Knurled Beauty Rings help reduce slippage for hand tightening applications. DirectTorque Technology