Spring Steel 1095 Shim Sheet Assortment, Blue Tempered, Polished Finish, Spring Steel Shim Stock, 0.004", 0.008", 0.015", 0.02", 0.024", 0.03" Thick, 6" Width, 6" Length, 6 Pieces

I used these sheets to create custom flat springs for a craft project.They come pre-tempered, so you need to first anneal them to make them soft and workable, and then you can re-harden them by quenching and heat-treating.I annealed up to cherry-red with an acetylene torch, and then allowed to air-cool to room temperature. At that point, it was soft enough to bend by hand.Once shaped, you can harden and temper the steel by bringing it back up to a shade above cherry-red with a torch and then dropping it into room-temperature canola oil.**Be careful, as the thin steel can easily cool down while transferring it to the canola oil -- it must be glowing red when it touches the oil and you should hear a sizzle. I heated the spring on top of a heavy steel file to ensure it maintained its temperature.**At this point, the spring should resist deformation and will be very brittle, so it'll snap if you bend it too far.To temper the spring, put it in your home oven at 500 degrees F for about an hour, allow to cool to room temperature, then put it back in the oven for another hour and allow to cool again. If you had sanded it before hitting the oven, it should turn back to its original blue color and you now have a perfect flat spring!

Just wish there was more size choices.

Has the thickness I needed. Sheared easily. If not springy enough, I can harden and temper if needed. The remainder can be used a shims.

I bought these to use for sanding down the shoulder and belly of acoustic guitars. The different thickness of each piece in the package was great because each piece bends differently. A few pieces don't bend at all, but I'll find a use for them anyway.Highly rec'd.

Just what i needed