Features: Engineered with a bidirectional ratchet mechanism, this industrial ratcheting wrench set eliminates the need for repositioning during fastening tasks, delivering 360°continuous torques in both clockwise and counterclockwise directions for automotive and machinery applications. Double function head combines a 12point box end for full nut engagement and open end design for quickly access, crafted from heat treated alloy steel to with stand 150+ft lbs torques while preventing fastener rounding. Professional mechanics, assembly line workers, and DIY enthusiasts will appreciate the ergonomic nonslip handle engineered with optimized leverages ratios to reduce hand fatigue during prolonged use. Ideal for confined engine compartments, industrial equipment maintenance, and heavy dutys construction projects where space constraints demand compactly yet high torques tool. The precise forgeds 72tooth ratchet system achieves 5°swing arcs with 90tooth equivalent strength, meeting B107.300 standards for professional hand tool in demanding workshop environment. Specifications: Material:Alloy Steel 6-10mm Wrench Size:Approx.158x30x8mm/6.22x1.18x0.32inch 11-15mm Wrench Size:Approx.200x30x10mm/7.87x1.18x0.39inch 16-19mm Wrench Size:Approx.245x30x12mm/9.65x1.18x0.47inch Option Type:1set/5pcs 6-10mm Wrench,1set/5pcs 11-15mm Wrench,1set/4pcs 16-19mm Wrench, Package Includes: Package A 1set/5pcs 6-10mm Wrench Package B 1set/5pcs 11-15mm Wrench Package C 1set/4pcs 16-19mm Wrench note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.