How to clean waste pipe under sink?

RETURN UNOBSTRUCTED: This drain clog cleaning tool is suitable for dredgeing pipes 24'' / 61cm in length and 3/4'' or above in diameter. （Highly suggested choose our drain clog remover only when AA battery could get into inlet of your clogged drain.） Effective cleaning by catching firmly hair, food, especially the toughest solid blockages.

HUMANIZATION DESIGN: A humanization designed drain hair clog remover tool, durable black ABS wrapping with smooth surface on bendable stainless steel spirals, won't clamp hand while operating, nor entangled by hair, easy and safe to rinse off then storage.

ENVIRONMENTAL & HOUSEHOLD ESSENTIALS: Our snake drain auger is chemical free and could be used repeatedly, it's a premium substitude of plastic & liquid drain opener, safely and friendly for our home and social environment. Best choice for your periodically clean all drains in your home to prevent clogging, 1~2 times per week is highly suggested.

EASY OPERATION & MULTIPURPOSE: The flexible plumbing snake drain, plastic handle controls the 35.4'' drain snake auger, stretch into clogged drains or pipe sewers, and push handle end to open the claw on the opposite end, to grasp obstructions stuck in household drains - bathrooms, kitchens, sinks, tubs, basin, toilet and sewers.