The Beta Tools of Italy 920/55 Reversible Ratchet is not your ordinary 1/2” drive ratchet. Instead of using a double-pawl inside, Beta Tools uses a solid, one-piece pawl with 17 teeth on it.
This is unique not only because this is more total teeth than most ratchets, but also because the design allows all 17 teeth to be engaged at one time through the tightening or loosening operation. 
This ratchet has 72-teeth, but Beta Tools also offers a 48-tooth option that has an 11-tooth pawl.
The 72-tooth model only requires a 5° angle of operation. 
Since 1980, Beta Tools of Italy has used this single-pawl design throughout Europe because of its durability and is now available in the U.S.
The Beta Tools Reversible Ratchet is available in 1/4", 3/8”, 1/2" and 3/4" drive sizes. The 1/4" is only available in 48-teeth and the 3/4" is only available in 72-teeth, but the 3/8” and 1/2" are available in both 48-teeth and 72-teeth versions.
