B1ST Drain Auger Drain Snake for Toilet Sewer Sink Snakes Plumber Cleaner Closet Drum Plumbing Auger Tool Clog Remover Pipe Cleaners for Bathroom Metal Spring-Steel Black Long-Lasting Durability - Rugged high carbon spring wire and high impact polymer drum housing are designed to stand up to the rigors of the household or even professional plumber. 8 mm x 12 mm x 4 m metal snake with a basin plug head fits through most center holes in the sink waste plug. Quick and Easy Cable Adjustments - metal thumbscrew and lever cable locking mechanisms offer maximum comfort and ease of operation while ensuring a solid lock on the cable and long lasting durability Applicable for household, small straight pipes of diameter 20-75 mm and "S" or "L" pipes with a diameter more than 50 mm in lavatories, bathroom and kitchens.For ease of operation, please use according to the Operation Guidelines and suggestions in the Product Description. Also, please use the attached operation photo in the description. Tip: When you do encounter a blockage, after spinning the hand crank clockwise, if the wire feels 'stuck' in the drain or you can't push it in further or pull it out, simply spinning the hand crank in the opposite direction a few turns will free up the wire.