The Life Instruments 837-0904-0 Bayonet Kerrison Rongeur is a bone rongeur designed for use in neurology, orthopedics, and general surgery. Made in the United States by Life Instrument, this rongeur is a precision instrument with a 4mm working diameter. It is intended for delicate and precise instrumentation during surgical procedures, ensuring optimal results and patient outcomes. With its durable construction and innovative design, this rongeur is a reliable tool for healthcare professionals in various surgical disciplines.