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Use a Simple Guide to Enlarge a Lockset Hole

When I need to enlarge a hole in a door for a new lockset (say, from 21/8″ to 23/8″), I use a shop-made guide and a standard hole saw.

The guide is a scrap piece of ½″ plywood with a hole that’s sized to accommodate the lockset. Use the paper template that comes with the lockset to locate the hole in the guide (Guide Layout Detail).

Drawing and Guide Layout Detail

After cutting the hole with a hole saw, align the guide on the door. (I attach scrap blocks to the guide to register it flush with the edge.) Now clamp the guide in place, and use the same hole saw to enlarge the opening in the door. The guide keeps the hole saw straight, ensuring an accurate cut.

Good woodworking,

Wyatt Myers
Online Editor, Workbench

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