Review pictures. Comes with Chuck key. Tested and working. Normal marks from use and knocking around. We oiled tool prior to testing. Oil before you use it as well.

Brand: Mac
Accessories: Chuck Key
Chuck Size: 3/8in.
Type: Straight
Air Inlet Size: 3/8in.
Chuck Key Type: Keyed
Manufacturer Part Number: AD540
Set or Single Item: Single Item
Maximum Speed(RPM): 1800RPM
Features: Reversible
Country/Region of Manufacture: Taiwan