18 hex key sizes included: 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8-Inch and 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm

Color-coded sleeves for quick identification of each key size

Extra-long arms are 30-Percent longer for greater reach and leverage

Round shanks with plastic sleeve provided enhanced comfort during prolonged use

Ball-end hex keys for working at angles up to 25 degrees

Heat-treated and tempered for added strength and durability

Rust resistant black phosphate coating on every key

Interlocking cases for sleek and convenient storage to stack SAE and metric sets together