Professional impact driver for commercial / garage use. Impact driver 1/2" square drive. Total length of impact driver 6" (without screwdriver bits attached) Manufactured from chrome vanadium steel for strength and durability. Simple to use simply hit the end with a hammer causing the end to spin around and undo / tighten the screws / bits etc... 1/2" drive so can take the bit adapter off and use standard 1/2" sockets. 7pc 8mm Impact screwdriver bits included : PH2 36mm length PH3 36mm length PH3 70mm length Flat blade 7mm 36mm length Flat blade 8mm 36mm length Flat blade 8mm 80mm length. Includes blow molded plastic case for easy storage and transportation.