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The Daily Insight

What is a bore hole on a door

Author

Lily Fisher

Published May 10, 2026

Bore holes are the holes in the door that house your door hardware and allow it to be installed. … The latch bore, also known as the edge bore, is the hole drilled from the side of the door into the cross bore to allow the latch of the lock to be installed and to accommodate the sliding of the deadbolt.

What does no bore on a door mean?

We refer to the round holes where the door lock is installed as “bore holes” (brush up on your door hardware terminology here.) Most doors have one, two or three bore hole. If the door has no bore holes, you can simply install a non-turning or “dummy” knob or lever that serves as a decorative door pull.

How do you fill a mortise lock hole?

Apply glue to the interior of the hole. Tap the dowel plug into the hole as far as possible, aligning the grain pattern of the dowel rod vertically. Allow the glue to dry overnight. Force wood filler into any seams around the perimeter of the patch.

Why is there a hole in my door knob?

Many door knobs have a hole on the side near the narrow end that is close to the door. This is a release so the knob can be removed. Pressing a paperclip into the hole will allow the knob to be pulled off. You’d want to do this with lever style handles if they need to be reversed to point toward the hinge side.

What is a lock bore?

Lock Bore The diameter of the hole for the lock body.

What is a door latch lock?

Bolt or Latch The lock engages a bolt inside the door. This piece of metal extends from the door into the frame and holds it closed. There are two main styles of latch (or bolt)—a spring bolt and a deadbolt.

What is a non turning door knob?

Half dummy door knobs are non-locking door knobs that don’t have to be rotated or turned when opening or closing a door. Instead, you simply pull on the door to open it. Half dummy door knobs are mainly used on double doors that close side-by-side, such as on cabinet and wardrobe doors.

What size hole do I drill for door latch?

The standard sized bore hole is 2 1/8″ in diameter. Through the edge of the door there is a 1″ cross bore that extends from the edge of the door through the bore hole. This cross bore is where the latch is installed. In addition to the two cross bores, a door can be prepped for one of 3 different types of latches.

Does Home Depot cut door holes?

Home Depot does not cut and trim doors on-site but if you purchase a door through its installation service, you can request exact measurements. Alternatively, you can rent one of two circular saws for $43-$744 or $49-$80 for 4-hours to 4-weeks or purchase a door trimmer and saw outright in-store or online.

What is the hole on the side of a door knob?

The latch bore, also known as the edge bore, is the hole drilled from the side of the door into the cross bore to allow the latch of the lock to be installed and to accommodate the sliding of the deadbolt. The diameter of the latch bore is generally 1” to accommodate bolts from either mechanical or electronic locksets.

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Are door locks universal?

Door levers are left-handed, right-handed or universal. To determine what you need, look at the door from outside the house or room. If the hinges are on the left, look for a left-handed or universal lever.

What is a strike plate on a door?

Strike Plate This is the plate the latch-tongue, or deadbolt-tongue will connect with. It should sit flush with the door jamb. Any passage or privacy set needs to have a strike plate for the door to latch. Additionally, deadbolts need a strike plate to properly lock.

What is a Prehung door?

A pre-hung door comes already mounted into a frame and the whole thing is installed at once. Keep in mind that installing a pre-hung door means you’ll have a large hole in your home, so you should plan to complete your exterior door installation in less than a day.

Why are round door knobs illegal in the US?

As University of British Columbia professor Tim Stainton explained in the article, the doorknob ban is in the spirit of a concept known as universal design, which holds that environments should be built to be usable by a majority of people regardless of age or capacity, rather than adapted to meet the needs of the …

What are dummy door handles used for?

Dummy Handles are usually used as decorative door pulls, often found on interior French doors, wardrobes, linen cupboards, or pantry doors. These are mounted to a door simply to give the door a handle to pull open without turning – they don’t actually have any internal working parts.

How does dummy door knob work?

This type of door doesn’t have a traditional latch, but sports a magnetic or ball-catch that holds the door shut. The dummy knob is installed on the exterior side of the door and used to pull the door open and push it shut.

Are all door latches the same?

In the United States, there are two common backsets for residential door locks: 2 3/8 inches and 2 3/4 inches. Pack your locks with a 2-3/8-inch or 2-3/4-inch latch, depending on which backset you specify.

Does Lowe's cut door knob holes?

Door cutting at Lowe’s is free if you have purchased the door through Lowe’s, which you can order to the exact fit, hinge prep, and bore you require. If you require an adjustment on your Lowe’s door, it will be free as part of the installation and ordering fee you pay.

Do doors come with hinge cutouts?

Yes, if you buy a pre-hung door, which has the door installed in its jamb. That means you have to remove the existing door trim (carefully, because you probably want to reuse it) and pull the trim nails out from the back side of the trim.

What is standard door latch size?

We generally recommend that a 76mm Overall Latch Size is ordinarily the best size for most lever handles. However the shorter 64mm Overall Size should be used where the door is glazed, to minimize the risk of hitting the glass rebate when drilling to fit the latch.

How is cross bore measured?

Standard cross bores measure about 1 inch in diameter. The latch bore can be found on the edge of the door, and its standard size is 2 1/8 inches. Also measure the door’s backset, which is the length straight from the middle of the cross bore out to the door’s edge.

What size is a deadbolt hole?

Be sure to use the correct size drill bits specified in the lock set instructions, though most standard deadbolts require a 2 1/8-inch hole saw for the lock bodies and a 1-inch spade bit for the sliding bolt assembly.

How do you open a door without a handle on the other side?

  1. Get a putty knife or butter knife and insert it between the door and the strike plate.
  2. To pinpoint where the door latches, keep sliding in the knife until you feel it end out on the door latch.
  3. Push the knife into the strike until you’re able to slide the bolt out of the door strike.