The K-Tool Fraction Socket Tray Sets are available in SAE (No. KTI72470) and Metric (No. KTI72475) options. Made of heavy duty plastic, the 3-pc sets include 1/4”, 3/8” and 1/2” drive socket trays which hold a range of sizes from 1/4" to 1-1/4" and 4mm to 27mm. The SAE trays hold 26 sockets each while metric trays hold a range of 28 to 34 sockets. The socket trays also are available individually.