The interchangeable crochet hooks are from the Knitter's Pride Ginger series and are made of polished wood, ensuring smooth effortless crocheting with no snagging. The hooks are 6" long and attached to a Knitter's Pride interchangeable cords - the length of which the crocheter can choose. The cords to screw in to the shanks of these hooks can be found here.
ChiaoGoo flexible hooks have a 6" (premium) bamboo shank and a 32" cord.
Susan Bates straight hooks are aluminum and measure 9" from the end of the hook to the stopper at the other end.