Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Primitive Plus Free.
Primitive Plus v1.2.1
Primitive Plus v1.2
Compatible with Unity5.3
Primitive Plus adds more shapes to use in Unity. Rather than just having cubes, cylinders and spheres, Primitive Plus gives you a number of additional shapes. In your hierarchy of your scene you can simply select Create > Primitive Plus > [Object], it’s as simple as that! Enjoy!
• 40+ Shapes
• 2D & 3D Shapes
• Simple Material Editing
• Code Generated Shapes (no models)
• UV Mapped
• Easy to use