The “Specialist wrench set” design utilizes a simple and yet ergonomic shape in concert with hardwearing materials to create a highly functional, durable and attractive design. These tools represent the backbone of any professional workshop and are in daily use. The modular wrench extender allows the mechanic to easily ramp-up leverage for stubbornly tight parts like pedal threads etc. A discrete locking screw allows the wrench extension to securely attach to the handle of the wrench, thereby guaranteeing a secure fit even under high loads. The wrench extension is compatible with the wrench set and can be used whenever additional leverage is required.