These are regular shepherd hook shapes They all have a small ball as well as a spring as their feature.
These are really old stock, at least 20 years old and are a beautiful quality with an excellent annealed coating. Whether they are nickel free or not, we can't tell you as we don't have that information.
We have never had a problem with the quality of these hooks. Unlike some modern items that are based with iron, you will find our brass based wires will not snap as they are very flexible.
Quantity per pack: 50 (25 pair)