There are many different types and styles of crochet hooks. They predominately vary by material and design. Material-wise there are: Aluminum Steel Wood Bamboo Resin Plastic There are also ergonomic hooks which usually have a rubber or silicone grip and either a plastic or metal hook section. Each manufacturer has their own style, but an important characteristic is the hook shape. There are "tapered" and "inline" crochet hooks. Tapered hooks have an angled hook while inline h