4pcs Commercial Spring Hinges Heavy Duty | Mechanical | Hold Open | 4.5x4.5 | 8ft | 260 lbs | 1 ¾” Thick | SS304 | K51M-450-C4

Waterson Commercial Spring Hinges Heavy Duty use an adjustable mechanical spring to control large commercial doors up to 260 lbs with consistent self-closing performance. These 4.5-inch hinges provide a fixed 90° hold-open position and smooth self closing control, allowing the door to operate without an overhead closer. Attention: Special finishes (US4) is non-refundable DESCRIPTION DETAILS SPECIFICATIONS VIDEO Applications Hotel Rooms  Fully Exterior   Arch Top  Heavy Duty Courtyard Style 8ft Door Product Description and Features Fully adjustable closing force and speed according to environment needs Numerical adjustment panel on hinge end to set up precise tension Mechanical only mechanism supporting heavy duty and fully exterior   Aesthetically pleasing compared to door closers -- without extrusive arms  UL certified cycle testing ensures many years of low maintenance. Installation Kits   Both machined #12-24 UNC ½”L and wooden tapping #12 x 1 ¼” screws included -- eight