features and benefits:
- socket is designed to tackle the toughest jobs with solid durability and keeps them pounding job after job
- forged from the finest chrome-molybdenum alloy steel, the best choice for strength
- radius corner design extends the life of fasteners; design drives the side of the fastener instead of the corner
- design also avoids rounding of rusted or damaged fasteners
this is an impact socket and it is 12 mm.It is 1/4 in.Deep and magnetic.Socket is black oxide finish and has etchings for identification.