Ives 3CB1HW 4.5X4.5 NRP 3-Knuckle Concealed Bearing Hinge, Heavy Weight, 4-1/2" x 4-1/2", Non-Removeable Pin, 

• Recommended for heavier weight doors (>150 lbs)
• Recommended for high-frequency usage (400 cycles per day)
• Made with two heavy-duty concealed nylon bearings
• Recommended for use with a door closer
• Packed with fasteners for hollow metal and wood doors

Ives 3CB1HW Certifications

• Certified to ANSI/BHMA A156.1 for performance standards
• Meets ANSI/BHMA 156.7 for template hinge dimensions
• UL Classified for windstorm-rated assemblies - R37965
• UL Listed, 3-hour fire doors Material substrate
• Made from brass, 1040 steel, or 304 series stainless steel