Bommer Industries, Inc., and their premium hinges are backed by over 125 years of innovation in the hardware industry. Shop for Bommer double acting hinges, adjustable spring hinges, and gravity pivot hinges at Woodworker’s Hardware. The 7500 series Bommer pivot hinges are available in auto-close or hold-open variations. The 7100 and 3000 series Bommer spring hinges are rated to handle up to 75lbs swinging doors. Buy your hinges in bulk and save with volume discounts!