The STANLEY ST87448 Basin Wrench 22 mm / 7/8" is a durable plumbing hand tool designed for tightening and loosening faucet and basin nuts in tight spaces beneath sinks. Its spring-loaded jaw provides a secure grip and helps prevent slipping, while the adjustable head pivots up to 180° to accommodate different working angles. The long steel handle provides additional reach and leverage, making it suitable for bathroom and kitchen plumbing installation and repair work.