E900 Hardware SL728 Lock-End (0.177-in #7 Wire) Black Steel Garage Door Extension Spring Concrete Placer x 20-1/4 in

x 20-1/4 in

Pre-drilled for a 4 in

Offering a durable and sturdy construction

Versatile 9-in-1 Tool: Functions as scraper

E900 Hardware SL728 Lock-End (0.177-in #7 Wire) Black Steel Garage Door Extension Spring Concrete Placer x 20-1/4 in2 x SL728 springs support 90 pound to 150 pound garage doors 4 x SL728 springs support 150 pound to 300 pound garage doors Length over coils: 28 inches Outside diameter: 1 5 16 inches Wire gauge: (0. 177) #7 Initial tension: 110 120 Maximum allowable stretch: 18. 5 inches Manufacturer warranty: 1 year Features Package Quantity 1 Package Contents 1 one piece lock end extension spring Color Finish Family Black Length (Inches) 28 Material Steel