To use the 
Monument 3313S, first feed the 6mm spring out of the rotatable container into the drain. Rotate the container to push the spring further into the pipe, using its corkscrew end to dislodge and break up any clogs. Once the clog is cleared, slowly pull the spring back out, keeping it contained in the plastic housing as you withdraw it from the drain. 
Step-by-step instructions
Prepare: Put on gloves and eye protection.
Feed the spring: Pull the end of the 6mm spring out of the rotatable plastic container.
Insert into drain: Feed the spring into the drain, keeping the container away from clean surfaces.
Clear the clog: Once you feel resistance, start rotating the plastic container to push the spring deeper into the pipe. The corkscrew end will grab and break up the clog.
Retrieve the spring: After the clog is cleared, slowly pull the spring back out while rotating the container to keep it contained.
Clean up: Dispose of any waste and clean the tool as needed, following local regulations.