Super Set- Our product includes three different specifications for bits, six characters, cross and mark, total 12 pieces and 1/2 inch detachable handle which will largely meet your usage demand . High Quality Material- The whole punch set is made of vanadium steel, which has high hardness, wear resistance and rust resistance. Dont worry that the product will be easily deformed and rust will affect its use. Adjustable-The head can be adjusted by rotating the head back and forth and the screws tightened or removed. Pointing to L loosens the screw, and pointing to R tightens the screw. Wide Usage- The blow set is mainly used to disassemble stubborn bolts, auto parts, bolts rusted, etc., which are extremely difficult to dismantle. Our products have an iron storage box, convenient to carry, convenient and practical. Tips - Aligning the drill with the screw, hit the back of the hammer drill directly with a hammer . The front drill rotates automatically and the head can be adjusted to rotate forwards and backwards. The upper and lower screws can be adjusted. Size: as shown Box size: 18.5 x 7 x 3.5 cm. Weight: 1.1 kg Delivery quantity: set of 13 pieces