Features:

1. Tool Types: A good kit should contain a range of tools with different shapes and sizes to accommodate various modelling techniques. The assortment allows for precise shaping, detailing, and texturing of the clay.

2. Material: The tools are usually made of durable and flexible plastic. Plastic tools are generally lightweight and easy to handle. They be sturdy enough to withstand pressure and manipulation without breaking or bending.

3. Ergonomics: Consider the comfort and ergonomics of the tools. Look for tools with comfortable handles that provide a grip and reduce hand fatigue during extended modeling tool.

4. Versatility: Check if the tool kit offers versatility in terms of functionality. All tools have dual ends with different shapes, allowing for a wider range of sculpting options without the need for additional tools.

5. Cleaning and Maintenance: Consider how easy it is to clean the tools after use. Look for tools that are easy to wipe or wash clean, as clay can stick to the surface during modeling.

6. Quality and Durability: Ensure that the tools are made of high-quality plastic that won't degrade or chip easily over time.