Carolus 10" Adjustable Ratchet Spanner 250mm CAR203 has a specially designed ratchet jaw with a maximum opening of 34mm that eliminates the need for you to stop and breakaway from the workpiece/fastener that you are working on. The ratcheting spanner is perfect for plumbers, electricians, engineers and people who need to work in tight or difficult work spaces as it prevents the problem of rasped knuckles and helps save you time and effort by not needing to continually reset the spanner on the workpiece.