The Stanley BR45350 underwater hydraulic breaker — also known as the BR45 — is the smallest breaker in Stanley’s lineup of underwater demolition tools, engineered specifically for light-to-medium duty applications. Designed for use by commercial divers, this breaker excels at breaking and removing concrete, rock, coral, and other hard underwater substrates, while also being suitable for light rod driving and tamping tasks.

Built with a rugged, durable construction yet relatively lightweight for its class (40–55 lb), the BR45350 features a comfortable T-handle with a large on/off trigger that gives operators precise control during use. Its feathering on/off valve allows adjustable output energy across the full range, making start-up and initial tool bit placement easier and safer in underwater conditions.

Key design elements include a diaphragm-type accumulator for extended service life and added blow energy, a four tie-rod structure for durability, and a modular design that simplifies servicing. The breaker uses standard 1″ × 4¼″ hex shank bits, operates effectively in any position, and handles typical hydraulic flow and pressure ranges found in diver-operated hydraulic systems. Painted in high-visibility yellow for easy identification underwater, the BR45350 is a trusted choice for marine construction, underwater demolition, coral removal, and other commercial diving operations.