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Door hanging and lock fitting are jobs where a badly arranged tool belt causes more trouble than a missing specialist tool. You move between the hinge side, latch edge and floor repeatedly, often while holding a door or operating a drill. The useful setup keeps measuring and marking tools immediately accessible, carries only the chisels and drivers you will use, and leaves bulky tools on the floor or in a nearby kit.
Start with the job, not the belt
Before loading up, identify the door type, hinge size, lock case and frame condition. A new prehung door needs a different kit from a replacement slab door. For a slab door, allow for hinge recesses, hinge screws, latch and strike preparation, trimming, and repeated test fitting. Lock fitting adds a sharp chisel, marking knife, square, drill bits, screwdriver or driver, and possibly a hole saw.
Lay the tools out on a bench or clean floor and divide them into three groups:
- On-body essentials: pencil, marking knife, tape, combination square, utility knife and one or two screwdrivers.
- Close-at-hand tools: chisels, block plane, drill and bits, countersink, hammer and spare screws.
- Occasional tools: clamps, hole saws, router, long level, wedges and replacement blades.
This division prevents the common mistake of wearing a fully loaded belt while climbing, kneeling or carrying a door. A belt that weighs 15 to 20 pounds becomes tiring quickly and can catch on the jamb. Keep a small tool bag within two steps of the work instead.
Arrange the belt around your working hand
Put the belt on and mark the hand you use for the chisel and screwdriver. Keep measuring and marking tools on the opposite side, where they can be reached without crossing over the work. If you are right-handed, a practical arrangement is tape and pencil on the front-left, square and knife on the left hip, screwdriver and bit holder on the right hip, and a hammer loop behind the working hand.
Do not place a hammer directly over your spine. It is uncomfortable when kneeling and can press into you when leaning against a jamb. Likewise, keep sharp chisels in a dedicated covered pouch or chisel roll rather than loose in a deep nail pocket. The cutting edge can damage the pouch, your hand or the door finish.
A wide, padded belt is useful if you will wear it for several hours. A lightweight electrician-style pouch or simple two-pocket belt is cheaper and adequate for one or two doors. The trade-off is capacity: large rigs carry more, but they also snag more and encourage you to bring tools that should remain in the kit.
A padded carpenter tool belt is worth considering for repeated site work. For occasional door repairs, a basic belt with a tape clip and two pockets is usually fine.
The core tools and where they belong
| Tool | Best location | Reason |
|---|---|---|
| 25-foot tape measure | Front clip or near the non-working hand | Fast checking of door, jamb and backset dimensions |
| Combination square | Side pouch, blade retracted | Marks hinge lines, latch positions and square reference lines |
| Marking knife and pencil | Small front pockets | Knife gives cleaner hinge and strike marks; pencil handles general layout |
| 3/4-inch and 1-inch bevel-edge chisels | Covered chisel pouch | Useful sizes for hinge gains, latch plates and strike plates |
| Block plane | Tool bag, not belt | Removes door-edge high spots without overloading the belt |
| Stubby screwdriver or bit driver | Working-hand side | Controls screws in tight hinge and lock-case spaces |
| Small hammer or mallet | Rear-side hammer loop | Drives chisels without blocking the work |
A 1/2-inch chisel is handy for fine corner cleanup, while a 1-inch chisel removes waste faster. Avoid carrying a full bench set unless you are doing extensive mortising. A dull or damaged chisel causes bruised hinge corners and oversized mortises, so carry a honing guide or sharpening kit in the tool bag rather than the belt.
A small bevel-edge chisel set is generally a better buy than a large set for door work. Check that the blades have protective caps and that the handles can take light mallet blows.
Set up for hinge fitting
Mark hinge positions from the top of the door or copy the existing frame. Use a sharp knife and square to score the hinge outline, then pare across the grain before chopping with the bevel facing into the waste. Work to the scored line in shallow cuts. Trying to reach full hinge depth in one heavy blow is a reliable way to split the stile or make the recess too deep.
Most standard interior hinges are about 3-1/2 inches or 4 inches long, but measure the actual hinge rather than assuming. A recess that is even 1 mm too deep can pull the hinge leaf below the door surface and alter the gap. Test the hinge leaf in the mortise before driving screws.
Keep the block plane nearby, but not in the belt. If the door rubs, plane only the marked high area and take two or three light passes at a time. Check the fit after each pass. Removing 1/16 inch unnecessarily can leave a visible gap that cannot be repaired without adding material.
Arrange for lock and latch fitting
Lock work needs accurate reference marks more than brute force. Keep the combination square, knife, pencil and tape together on the front of the belt. Mark the lock-case height from the finished floor or match the existing hardware. Confirm the backset—commonly 2-3/8 or 2-3/4 inches on many residential latch sets—before drilling. The wrong backset can put the knob too close to the door edge.
Use a sharp brad-point bit for clean pilot holes and drill from both faces when boring through the door. This reduces splintering on the exit side. For a mortise lock case, drill a row of overlapping holes inside the waste area, then square the cavity with a chisel. Do not lever aggressively against the thin side walls; that can break out the stile.
A door lock installation template can pay for itself when fitting several identical knob or lever sets. For one replacement lock, careful marking with a square is cheaper and often just as accurate.
Put the drill, hole saw and long bits in the nearby kit. They are too bulky for most belts and can swing into finished surfaces. Carry the screwdriver or bit driver on your body so you can install and remove test hardware without walking away.
Protect the door and control the failure points
Use a clean pouch, not a pocket containing grit and loose screws. A single metal shaving can scratch a painted door. Put removed screws in a small magnetic tray or lidded parts box; never leave them on the threshold where they can be stepped on or pressed into the finish.
Before kneeling, check that no chisel, square or drill bit is under your knee. Keep a door wedge, two padded trestles and a thin scrap board nearby. The scrap board protects the door face when setting it down, while the wedges prevent a partly hung door from shifting and pinching fingers.
Finally, do a belt check before lifting the door: sharp tools capped, hammer secure, tape clipped, driver loaded with the correct bit, and loose hardware contained. That small pause is faster than searching for a dropped screw—or repairing a mark made by the tool that was supposed to help.