The Wera Kraftform Kompakt 400 RA SHK Set 1 is tailored specifically for HVAC professionals, offering unmatched efficiency and versatility. This comprehensive 19-piece set features a T-handle bitholding screwdriver with an integrated fine-toothed ratchet, ensuring fast and secure operation in tight spaces. The ratchet mechanism, seamlessly embedded within the handle, facilitates convenient clockwise/counterclockwise direction changes with a simple reversing lever. Crafted for ergonomic comfort, the 2-component handle with finger recesses provides optimal power transmission and fatigue-free working, enhancing productivity during prolonged use.