Abstract: At 11:00 a.m. on August 2, 2024, Employee #1, a stone countertop installer, was cutting small holes in a quartz slab using a Makita Angle Grinder Model 9564CV, Serial Number 620119A. The grinder, which did not have a guard installed, uses abrasive cut-off wheels that rotate at speeds of up to 10,500 RPM. A piece of the cutting wheel edge broke away and lodged into the employee's head through the right cheek. The injury resulted in a traumatic brain injury secondary to disk blade fragment intrusion. Employee #1 was transported to the hospital and later died from the brain injury while at the hospital.