Kincrome Deep Impact Socket Set 31 Piece 1/2" Drive Metric K28209Kincromes range of impact sockets are manufactured from Chrome Molybdenum (Cr Mo) and feature a black phosphate finish for superior corrosion protection, Ink Fill stamping for easy size identification and colour coded rings for unit of measurement visibility . Our Peripheral Drive technology provides greater torque by relocation the load to the flat sides of a fastener, this allows for greater surface area contact and prevents rounding off of