Season 13

Find out how hammers , Swiss cheese , roller skates and colored pencils are made.

Learn how carbon-fiber bicycles , blood products , forged chandeliers and ballpoint pens are made.

Learn how Swiss army knives , piano player rolls , oil tankers and racing wheels are made.

Featuring bowling balls , barber polls, felt and radar guns .

Get the story behind copper pipe fittings , cylinder music boxes, pepper mills and hot rod steering columns .

Learn how gears , leather watchbands, vitrelle dishes and kitchen shears are made.

Find out how pressure cookers, mechanical singing birds , buoys and stainless-steel tank trailers are made.

Get the story behind aluminum boats, alpine horns and luxury watches.

Learn how All-Terrain Vehicles, Alpine skis , laser cutters and marble sculptures are made.

Featuring socket sets, leather shoes , aluminum water bottles and bike chains.

It's carved wood sculptures , flatware , cow bells and fountain pens.

Learn how olive oil , lift trucks , seamless rolled rings and ski boots are made.

It's professional cookware , luxury inlaid boxes , high-efficiency water heaters and Vespa scooters.