Samson Kettingpons

With a chain punching the bicycle chain can be disassembled by
partially the pin of a chain link to be pressed outward.

Kettingpons for single speed 1/2 x 1/8 chains

also, mounting the chain, often with the aid of a chain tool.

Tip:
Press the pin is not completely out of control, because it is very difficult to put it back in again