Chain tool for different speed chains

A chain tool for chains of different speeds comprising:

• a main body having a first body portion and a second body portion and including a working zone delimited by the first and the second body portions for receiving a chain;
• a driving mechanism supported by the first body portion and movable toward and away from the second body portion, wherein the driving mechanism includes a first driving member adapted to retain one of a pair of plates of the chain and a second driving member adapted to drive a pin through the pair of plates of the chain, and wherein the second driving member is movably coupled to the first driving member;
• and
• a stopper adapted to stop the pin selectively connected with the second body portion between a first and a second connection way, wherein the second body portion has a slot for connecting the stopper, wherein in the first connection way the stopper includes a first end inserted in the slot, and wherein in the second connection way the stopper includes a second end inserted in the slot;
• wherein the first driving member is hollow and the second driving member is inserted into the first driving member, wherein the second driving member includes a drive head at an end for contacting with the pin, wherein the stopper has a hole through which the pin is adapted to insert and a first stopping portion with a first stopping surface against which an end of the pin, which is opposite to an end against which the second driving member abuts to drive, is adapted to abut, wherein in the first connection way the first stopping portion is at a position that will not interfere with the pin, and wherein in the second connection way the first stopping portion is at another position in which the first stopping surface is adapted to block the pin;
• and
• wherein the hole extends through two opposite sides of the stopper, and wherein the first stopping portion protrudes outwardly from one of the two opposite sides.