Double End, Ratchet Ring Spanner, 21 x 22mm, Metric

For use where access is limited. With a built-in ratchet mechanism to provide speed and a reversible action which can be achieved by depressing the reversing lever or by simply turning the wrench over. All ratcheting ring wrenches are manufactured from chrome vanadium steel with bi-hex rings*.
*6mm x 7mm is single hexagon.