DEEP WELL SOCKET SET: Set included: 9，10，11，12，13，14，15，16，17，18，19，20，21，22，23，24，25，27，30，32mm deep & shallow sockets ; 3″, 5″, 10″ extension bar; 1/2″ universal joint(CR-MO); 3/8″F-1/2″M adapter. The extension bar can help you turn the bolts and nuts located in the deep recessed part. Suitable for the maintenance of various types of fasteners on the vehicleSUPERIOR CR-V STEEL: Constructed with heat-treated forged CRV material, our 1/2″ impact socket set has high hardness and durability, and can withstand greater torque from impact tools. The sturdy and professional chrome vanadium alloy structure allows you to undertake different projectsDURABLE & LASER MARKING: Different from the traditional black oxide coating, BOEN impact socket set 1/2 dirve adopts black manganese phosphate coating to provide excellent corrosion resistance and rust resistance for long-term use. Laser markings make all model numbers easy to keep, read and quick identification800N.m POWER WRENCH: The high-performance 5215 brushless motor transmits a maximum torque 600FT-LBS(800N.m) and max breakaway torque 750FT-LBS(1000N.m), which can even loosen stubborn nut within a few seconds. Using this electric wrench can significantly shorten your working time.4-SPEED MODE ADJUSTABLE: The 1/2 impact wrench supports 3 speeds from 0-950/1500/2200RPM adjustment to meet different work needs. The difference is that the minimum speed is reduced to 0-950 RPM. It can slowly remove nuts to avoid excessive torque damage to sockets and nuts. It is very friendly for beginners.