Surface Mount Inside Handle -Designed for use with a 5/16 Inch Spindle and Thumb Lock Screw holes on 1-3/4 inch centers-Fits right or left handed doors-Operates as a Lever Turn Only - NOT PUSH If Strike is needed order Amazon item: IR-DB-01-STRIKE or B00PR7GQNG Handy Thumb Lock Prevents Handle from Turning - Great to keep children in, but Not High Security Inside Handle Replacement White With Thumb Turn Fits Storm Doors from 3/4" to 1-14" Thick If your door is 1-1/2" Thick Order http://www.amazon.com/dp/B018BFGAIG