I agree. The extra-long Shimano replacement pin can be pushed almost half way in by hand (the bullet shaped end is a smaller diameter pin just for use as a guide). If you had a terribly badly designed or too-small chain tool (like a miniature one in a multi-tool, for instance) you would have to back the tool threads all the way out and maneuver the pin into the recess where the tool comes out. It can be done though. I have never encountered a chain tool that cannot be used to install Shimano rplacement pins.