Product name: 5-piece impact screwdriver. Color: Black Quantity delivered: 1 set of 5 pieces Product size: 36mm, SL7, SL8, PH2, PH3 Material: Carbon Steel It's hammer time: land a hard blow on stubborn rotor brakes, rusty engine fasteners, stuck nuts, frozen and corroded screws with the manual impact screwdriver set. Complete with a versatile set of bits for DIY repairs and garage jobs - all in a compact, durable housing ONE HIT - HUGE STRENGTH: Each blow of a hammer or mallet on the base of the hand impact driver translates into a rotational force concentrated on the tip of the tool's screw. Enough torque to start loosening or tightening brake calipers, brake rotors and motorcycle crankcase screws. TWIST TO ADJUST: Easy to use, straight out of the box. Push down firmly to disengage the internal spring-loaded lock, then twist clockwise to lock in the tightened position, or twist counterclockwise to lock in the loosened position Sturdy and ready: any amount of Pounding is absorbed by its solid, heat-treated #45 carbon steel construction with a rust-resistant chrome finish. Knurled countersinking provides a non-slip, tight grip even with gloves Hard SCREWDRIVER BITS for big jobs: Complete with the screwdriver bits most often used for driving large screws. Removing the bit holder allows you to have any square socket within easy reach. attached to loosen a stuck hex head screw Welcometomeet