1、Perfect Match: Through easy adjustment, the drill socket suits for various electric drills from 7 mm to 19 mm, wide in match. 2、High Accuracy: The extension bit allows you to operate the screw or nut in deep and narrow space with high working accuracy. 3、Practical Use: Used to repair mismatches on vehicles or bikes as well as being applied to maintenance or installation work. 4、Reliable Work: The sturdy overall structure enables great bearing capacity, while the simple operation will save your efforts. 5、Good Material: Made from alloy chrome vanadium steel, which has high hardness, good toughness and ensures great torsion as well. Item Type: Drill Socket Adapter System: Metric Wrench Shape: Socket Material: Alloy chrome vanadium steel. Surface Treatment: Mirror Treatment Weight: Approx. 160 g / 5.64 oz 1 x Drill Socket Adapter 1 x Extension Rod