Standard quick disconnect coupling on motor facilitates shaft exchange. No troublesome threading or stripping.Dual air filters extend motor life and allow for easier maintenance.Motor airflow from rear to front prevents dust buildup that would otherwise cause motor damage.Dust and waterproof on-off switch eliminates burnout and damage.Lightweight, but rugged unit preferred by operators.Double insulated and grounded motor improves safety.Circuit breaking carbon brushes stop motor when replacement is required.Strain relieved electrical cord inhibits cord pull out, reducing downtime.Standard 60 Hz electrical power.High frequency and amplitude of the vibrator head on the Head, Motor, Shaft (HMS) System ensures more complete consolidation of concrete.