What is the function of the box lock on a hemostat?

• A. It stores surgical lubricant
• B. It adjusts jaw width
• C. It sharpens the serrations
• D. It contains the locking mechanism to keep jaws closed

Answer: (D)

The box lock’s job is to hold the jaws closed with a locking mechanism. As you close the handles, a ratchet inside the box lock engages and locks the instrument in a clamped position, allowing you to maintain a stable grip and apply gentle, consistent pressure without continuous squeezing. Releasing is done by disengaging the ratchet with the release mechanism so the jaws can reopen. This is not about storing lubricant, adjusting jaw width, or sharpening serrations; those functions aren’t handled by the box lock.