CM 5/8 Combination Wrench.

Craftsman 5/8 in. X 5/8 in. 12 Point SAE Combination Wrench 8 in. L 1 pc

5/8-in. Standard SAE Combination Wrench has a corrosion resistant chrome finish providing extra wear and tear coverage while adding hardness and durability allowing your wrench to last longer. CRAFTSMAN(R) wrenches meet or exceed ASME specifications.
CORROSION RESISTANT: Chrome finish for corrosion resistance
QUICK ENGAGEMENT: 12 point box end for quick engagement with fastener KNUCKLE CLEARANCE: 15 box end offset for additional knuckle clearance
EASY IDENTIFICATION: Large markings for quick combination wrench identification
Meets or Exceeds ASME Specifications