National Hardware N236-013 Adjustable Steel Spring Hinge, Prime Coat, 4-1/2" BackToSchool the lower surface has a

the lower surface has a split-release silicone release backing for ease of application

T-25 & #2Phillips bit

4-hole installation

Made from 4 mil plastic sheeting

National Hardware N236-013 Adjustable Steel Spring Hinge, Prime Coat, 4-1/2" BackToSchool the lower surface has aNational Hardware 2060R Adjustable Spring Hinge is ideal for use in corridors, entrances and stairways. Automatically closes door an alternative to overhead mounted door closers. Patented ratchet adjustment eliminates need for adjustment locking pin. Meets NFPA8 standard for 3 hour fire rated doors minimum 2 spring hinges per door required. UL listed for doors up to 4' x 8' weighing up to 180 lbs. Conforms to ANSI BHMA standard A156. 17, Grade 1.