If you’re working on the tools day in and day out, you’ll want to protect yourself from hand and wrist strain. You need a high-performance spanner that’s designed to work with you, not against you, like the 440 Pro Series. The patented Anti - Slip design and Torque - Plus fastening system make tightening a breeze and limit potential damage to fasteners. The unique, ergonomic design ensures maximum user safety and provides greater torque, durability and comfort, while reducing strain on your joints. The 440 Pro Series is the perfect, hard-wearing spanner set for frequent, professional use. - Sizes are 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16”Patented Anti - Slip design and Torque - Plus fastening system - Unique, ergonomic design ensures maximum user safety and provides greater torque, durability and comfort