Is this leather good for tooling and stamping?

Yes, but with limits. Crazy horse is a pull-up cowhide, so stamps read softer and less crisp than on firm veg-tan. It works well for bold patterns and carved accents on small pieces.

How thick is it, and what can I make from one panel?

It is about 1.8–2.0 mm (5/6 oz) thick, and the panel is 12" x 6". That suits wallets, card holders, key fobs, small sheaths and straps; larger bags or belts need more panels.

Will the color change over time?

Yes. The waxes and oils in crazy horse leather shift with handling: bends and scuffs lighten, and rubbing or oiling darkens the surface. That patina is the point of the finish.

Do I need to dye or finish it?

No. The hide comes pre-finished with its brown pull-up surface, so most projects need only edge finishing and a light conditioner. You can still dye or seal it if you want a different look.

Can I sew it by hand or machine?

Yes. At this thickness it hand-stitches easily with a diamond awl, and a machine handles it with a leather needle and appropriate thread. Skive thicker overlaps for cleaner seams.