4 Piece Fuel Line Clamp set.
Clamp off Fuel, Vacuum, Transmission, Brake, Heater lines Etc.....
Sizes included: 
Extra Large 1-3/4 inch
Large 1 inch
Medium 1/2 inch
Standard size 3/8 

The big piece (EXTRA LARGE) is a whopper 1-3/4 inch,
and by itself would be worth the price of this set.
It is a very large tool measuring 4-1/2 x 4 inch 
The most popular size however is the STANDARD size (3/8)
A nice deal for a set of 4 clamps.