A high-speed straight surgical handpiece designed primarily for oral maxillofacial surgery, including impacted third molar extractions. With a 1:2 speed-increasing ratio, it achieves rotational speeds of up to 80,000 rpm, reducing cutting time by 70% (such as sectioning a tooth in about 12 seconds) while requiring significantly less force. It features an external irrigation system with sterile disposable tubing, a sleeve with irrigation tube locking ring, and a single-use bur guard that prevents fluid infiltration into the shank and motor to minimize overheating and extend service life. The compact design offers optimal intraoral visibility for less invasive procedures and supports universal 2.35 mm burs.