Ask the Experts | Ask the Door Guys | Differences Between 161 Prep and 86 Edge?

Question:
What is the difference between 161 Prep and 86 Edge?

 

Answer:

These are terms used to indicate the lock prep on the door.

161 Prep is a cylindrical lock prep with a 2-1/8″ hole at 2-3/4″ backset, where the door edge prep is 1-1/8″ x 2-1/4″. Optional thru holes are available upon request, but the manufacturer and model number needs to be specified.

86 Edge is a mortise lock prep where the door edge prep is 1-1/4″ x 8″. Optional face prep is available upon request, but the manufacturer and model number needs to be specified.

 

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