There are two measurement systems for tools: SAE, which stands for Society of Automotive Engineers, or metric. Metric sockets are measured in millimeters, while SAE sockets are measured in inches.

The Kendo 42-piece socket wrench set is on sale at Amazon for $20, ... Fortunately, this kit includes sockets in both metric (international) and SAE (U.S. standard) sizes.

DeWalt Tool Kit and Socket Set, $65 (was $109) at Amazon Courtesy of Amazon Durable metal construction makes the tools rugged and dependable, while the polished chrome finish adds a touch of beauty.

This limited edition tool set includes a wide range of SAE and metric-sized sockets, drive tools, 90 tooth ratchets, star bits, hex-bit sockets, ... “Very well put-together multi-driver tool set.