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.
Seeknit Bamboo double ended afghan hooks are made of Japanese Bamboo and measure 12" from one end of the hook to the other end.