Our 11PC 3/8" Drive Metric Hex Bit Socket Set with FOUR FLAT sides is designed from the ground up to be part of the most versatile socket family. Milwaukee bit sockets feature an innovative design with four parallel flat sides, which deter rolling and are wrench-compatible. This also creates a slim profile to provide the best access in tight spaces. 

• MOST VERSATILE SOCKETS. ANTI-ROLL, WRENCH-READY.
• FOUR FLAT Sides deter rolling
• FOUR FLAT Sides feature wrench-ready design
• Best Access - Slim Profile
• More Durable - One Piece Socket
• Laser Engraved Markings For Easy Identification
• Chrome Plated
• Rust Resistant
• Storage Rail Included
• Lifetime Guarantee