National Hardware N236-012 Adjustable Steel Spring Hinge, Satin Chrome, 4-1/2" Winter_Items The Tubular High-Tension Hacksaw features

The Tubular High-Tension Hacksaw features 45 degree and 90 degree adjustable blade angles as well as 300lbs of blade tension for flush cuts

Overall length: 5-1/4" (133 mm)

Ceiling Opening Size: 4-3/8 in

It's built to handle almost anything

Performance: GPH at 0' = 350

National Hardware N236-012 Adjustable Steel Spring Hinge, Satin Chrome, 4-1/2" Winter_Items The Tubular High-Tension Hacksaw featuresNational 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.