Surface mount storm door hardware Fits right or left handed doors Designed for a 1-1/4" thick door Zinc die cast inside and outside handle in durable black powder coat painted finish Comes with a drilling template for new door installation or replacement of old hardware Exterior has Push Button Function For exit interior has a push function One Year manufacturer's warranty for finish and mechanical features Interior handle screw holes are 1 3/4" apart on center Exterior handle bottom screw hole is 8 1/8" from center to center of key cylinder Total height of outside handle is 9 5/8" Width of outside handle at top & bottom is 15/16" Height of inside handle is 2 1/2" Width of inside handle is 15/16"