Amazon has this kit for 7.99 this is an S2 bits which is harder than the silver Cr-V bits.

https://www.amazon.com/gp/product…UTF8&psc=1

I stumbled upon that deal on Amazon while looking for watch repair tools. i had the same style set by a different brand for a few years and it has been awesome much better than the CR-V material of bits that bend and strip very easily. i ordered this kit and the quality is decent. my biggest issue with that style of kits was the driver was always bent a bit. this one didn’t have that issue, the drive is extendable and full metal body that feels robust.