The CT-5 is intended for derailleur chains. The wide 1/8" and 3/16" chains should use the CT-7. When pressing in or pressing out a rivet, place the chain roller over the chain tool cradle as showing in the image here.
The current CT-5 is designed to push the chain rivet from the chain side plates. If you do not want to push the rivet out, turn the handle only 5 complete turns with 9 and 10 speed chains.