Amigurumis and Crochet Hooks
When working with crocheted dolls, it's best to use aluminum hooks. I find that the tight stitches tend to snap the plastic ones. I've broken several plastic hooks (the really pretty colourful ones too) working on an amigurumi ear or thumb or other small part.













I also would recommend to have a smaller hook on hand.
I often use one or even two sizes smaller when the stitches are really tight to help me grab the yarn. The stitch itself (ofcourse) is made with the normal sized working hook.