✅ EFFORTLESSLY ADJUSTABLE – CUSTOMIZE YOUR CLOSING FORCE Titan Strike TS8000 Door Closer features an adjustable spring strength (Sizes 1-6) to precisely match doors from 44–330 lbs. Includes specialized valves: Backcheck (prevents damage from rapid opening), Latching Speed (secure closure without pinching fingers), and Delayed Action (gentle and safe closing). Heavy duty commercial door closer with regular arm for interior and exterior doors.