Snap ring pliers include first and second pivotal levers wherein the first lever has a first jaw and a first handle and the second lever has a second jaw and a second handle; a biasing member interconnecting the handles; and a ratchet mechanism comprising a curved ratchet rack having one end secured to an end of the second handle and the other end proximate an end of the first handle; a sliding member secured to the end of the first handle and comprising a projection at one end, and a channel with the other end of the ratchet rack moveably disposed therein; a lock member having one end pivotably secured to the projection and comprising a protrusion at the other end; and a pawl member on the lock member and having one end secured onto the projection, the pawl member comprising a lock hole with the protrusion locked therein.