Hook Plate - Dual Spring - 4 Inch Pulley Ferco Fire Rated 120 Minutes at

Fire Rated 120 Minutes at 1200°

Maximum Height: 1-3/4 inch

Application: Compatible with residential and commercial door locksets

have ANSI Grade 1 Certification

Hook Plate - Dual Spring - 4 Inch Pulley Ferco Fire Rated 120 Minutes atHOOK PLATE DUAL SPRING 4 INCH PULLEY. Part No: 22316. Includes one kit for a four inch pulley. Galvanized steel plates used to attach two springs to the moving pulley strap. For heavy duty door applications. Designed with slots alternating up and down to securely hold springs when bolted together for dual extension spring hookups. One set per side for most garage doors with dual extension springs.