Professional-grade kit specifically designed for unblocking and cleaning outdoor underground drainage systems, sewers, and pipes. 
 
The main difference between drain rod heads is 
their design, which is tailored for different types of blockages. Common heads include a circular plunger, which is good for general clogs, a screw/worm for tougher blockages that can be hooked, and a brush for cleaning pipes. Other specialized heads, such as a spade or scraper, are used for specific tasks like removing debris or hardened material from the pipe walls. 
Here's a breakdown of common drain rod head types and their uses:
Plunger Head: A simple, round rubber or plastic head that pushes against the blockage, good for general and soft clogs.
Screw/Worm Head: Has a spiral shape that allows it to screw into and pull out stubborn blockages, like tree roots.
Scraper/Spade Head: A flat, sharp head used to dislodge hard debris or scrape buildup from the sides of pipes.
Brush Head: A cylindrical brush with bristles, used to clean and remove residue from the inside of pipes. 
Other considerations
Pipe Diameter: The size of the head should be appropriate for the diameter of the pipe to be effective.
Material: Heads are made from various materials, such as plastic, steel, or rubber, to suit the task and the pipe material.
Flexibility: Some heads are more flexible than others, and this flexibility is often paired with a flexible rod to maneuver through tight bends and joints.