Hook Plate - Dual Spring - 4 Inch Pulley Ferco Application: Compatible with residential and

Application: Compatible with residential and commercial door locksets

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Fire Rated 120 Minutes at 1200°

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Hook Plate - Dual Spring - 4 Inch Pulley Ferco Application: Compatible with residential andHOOK 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.