Ratchetable open-ended wrench

摘要

There is provided a ratchetable open-ended spanner comprising: a head portion for fastening and loosening an object having a pair of wedge shaped slide pieces positioned inside the head portion, each slide piece being slidably coupled to the head portion, and coil springs disposed between an inner bottom surface of the head portion and one end of each slide piece opposed to the inner bottom surface, each coil spring elastically supporting each slide piece.