Choosing a torsion spring can be confusing because the term covers more than just "a spring." Torsion springs provide rotational return force when twisted, which is different from the push or pull of extension and compression springs. If your project involves a hinge, door handle, or 3D printer arm that needs to return to a set position, you need a spring built for torque. The 80PCS Torsion Spring Assortment Kit is designed specifically for that kind of task.
Quick verdict
The 80PCS Torsion Spring Assortment Kit, 20 Sizes 60/90/120/180 Degree Small Torsion offers a broad range of small torsion springs in one box. With 80 pieces spread across 20 sizes and four angle options, you get flexibility for small rotational repairs. The stainless steel construction and polished finish are appropriate for small mechanical parts. At USD 11.39, you get a practical range of sizes and angles without a large upfront investment.
Who this torsion spring kit suits
This kit is a good match for anyone repairing or prototyping small mechanisms that need rotational return force. Common projects include hinges, door handles, and 3D printer arms. If you are not sure which torsion spring size or angle you need, having 20 sizes and 60/90/120/180 degree options lets you experiment without buying individual springs.
What stands out from the listed details
The main advantage is the variety: 80 springs in 20 different sizes, with four angle choices. This increases the chance that one of the springs will fit your project. The stainless steel material and polished finish are appropriate for small mechanical parts. The light oil coating is normal for stainless steel springs and helps prevent rust during storage.
Meaningful trade-offs to weigh
This is a torsion spring kit, not a general-purpose spring assortment. If your project requires extension or compression springs, this set will not serve that function. The light oil coating is a normal part of manufacturing, but it may need to be wiped off if your application must be completely dry or clean. The kit focuses on small torsion springs, so larger or heavy-duty springs are outside its intended scope.
80PCS Torsion Spring Assortment Kit, 20 Sizes 60/90/120/180 Degree Small Torsion

For USD 11.39, this assortment gives you a wide selection of small stainless steel torsion springs in one package. Choose it when you need rotational force for small parts and you want a range of sizes and angles to work with. The trade-off is that it will not replace extension or compression springs, and the oil coating may need attention for certain applications.
Bottom line
If your project asks for rotational return force from a small spring, the 80PCS Torsion Spring Assortment Kit is a straightforward starting point. Keep the included sizes and angles in mind, and verify that a torsion spring is the right type for your mechanism.