A perforating surgical tool called the Backhaus towel clamp is used to fasten towels or drapes to a patient's skin while surgery is being performed. For a firm grip, it has a ratchet locking mechanism and curved, pointy points. These clamps, which are typically constructed of surgical-grade stainless steel, come in a range of lengths, including 9 cm (3.5 inches) and 13 cm (5.25 inches).