- What it is: A self‑retaining, hinged retractor with two opposing arms that spread apart to hold tissue edges open, eliminating the need for an assistant. - Key design: Features a spring‑loaded ratchet mechanism and blunt, curved blades (often 3–5 inches long) that can be set to various widths. - Main uses: Provides continuous exposure in superficial and deep surgical fields—common in orthopedic, neurosurgical, vascular, and veterinary procedures. - Materials: High‑grade stainless steel for strength and corrosion resistance; blades may be smooth or have fine serrations. - Specialty variants: “Sharp‑pointed” blades for delicate tissue, “blunt” blades for thicker muscle layers, and pediatric sizes for smaller incisions. - Why it matters: Its self‑retaining action frees the surgeon’s hands, improves visibility, and reduces fatigue during long operations.