Tools Needed to Assemble Flat-Pack Furniture
The essential and nice-to-have tools for building flat-pack furniture at home, what the supplied key is good for, and when a drill helps or harms.
Flat-pack furniture comes with a small bag of fixings and perhaps a hex key, but the right extra tools turn a frustrating build into a tidy one. Here is what you actually need, what is optional and what to avoid.
The essentials
Screwdrivers
A cross-head screwdriver in two sizes covers most builds. Choose ones that fit the screw heads snugly. A worn or oversized tip slips and damages the head. A small flat-head is useful for prising out caps and covers.
Hex keys
Many pieces include a bent hex key. They work, but they are slow and hard on the hand. A set of proper hex keys, or a T-handle, is faster and gives more control for tightening cam bolts and connector bolts.
Rubber mallet
For tapping dowels and panels together without marking the surface. A hammer works in an emergency, but use a block of scrap wood to protect the finish.
Spirit level
For checking that a wardrobe or bookcase stands plumb after assembly. Even a small one avoids doors that swing open or drawers that run to one side. Phone apps can be a rough guide.
Tape measure and pencil
For marking positions on walls if you fix furniture to the wall, and for checking spacing.
Useful extras
- Cordless drill with a clutch. It is faster than a screwdriver, but it must be on a low torque setting. Overtightening strips screws and splits chipboard.
- Small pliers. Useful for stubborn pins and pulling out bent fixings.
- Masking tape. To label parts and hold small pieces while you start fixings.
- Torch or head torch. Dark inside wardrobes makes detail work easier.
- Old blanket or the packaging. A soft surface protects panels while you work.
- Stud finder and wall plugs. For fixing to a wall; the right fixing depends on the wall type.
What to avoid
- Powerful impact drivers on thin chipboard; they over-drive fixings quickly.
- Glue, unless the instructions call for it. It can make correcting a mistake impossible.
- Using the wrong size of screw because it was in the toolbox.
- Oil or lubricant on fixings meant to grip, such as cam locks.
Using tools sensibly
Hand-tighten the first stage, and then do the final tightening once the whole structure is assembled. This allows slight movement so holes align. Finish by tightening all connections in a logical order, checking that the piece is square by measuring diagonals. If the two diagonals are equal, the piece is square.
For wall fixing, the fixing type matters: plasterboard needs a different plug from brick or block. Anti-tip fittings supplied with furniture are not always suited to every wall, so check the instructions. See anchoring bookcases and tall furniture to walls for more detail.
When to leave it to someone else
If you do not own the basics, a single large build may cost more in tools than the assembler's fee. For one-off jobs, particularly bulky wardrobes or items that need wall fixing, it may be more sensible to hire. Assemblers bring their own tools, and you can ask the provider to confirm any special requirements before the visit. See how much furniture assembly costs for guidance.
A worked kit for a typical Saturday
For a single wardrobe, chest and bedside table, a decent kit is a cross-head screwdriver (sizes 1 and 2), a flat-head screwdriver, a set of hex keys, a rubber mallet, a tape measure and a small spirit level. A cordless screwdriver with an adjustable clutch can speed up long screw runs, but use the manual setting for the final tightening. A pencil, a small tray for screws and a sheet or cardboard for the floor complete the picture.
Tool choices compared
| Tool | Helps with | Watch out for |
|---|---|---|
| Manual screwdriver | Most fixings, delicate parts | Slower on big builds |
| Cordless screwdriver | Many long screws | Overtightening, stripped heads |
| Rubber mallet | Dowels, panel seating | Heavy blows damaging edges |
| Spirit level | Wardrobes, shelves, tables | Placing on a warped surface |
| Pliers | Stubborn or bent fixings | Marking finishes |
Safety and care
- Wear gloves when handling glass or sharp metal.
- Keep fingers away from the rear of panels when hammering.
- Clean up packaging and small fixings so children and pets cannot reach them.
- Protect floors, as dragged panels leave scratches.
When tools are the wrong answer
If a hole is stripped or a panel is cracked, additional force makes things worse. Stop, look at how to fix wobbly furniture, and consider asking for help. Safety-critical items like cots and bunk beds should always follow the maker's instructions exactly.
Frequently asked questions
Can I build flat-pack with only the supplied hex key?
Often yes for simple pieces, but it is slow and tiring. A screwdriver and a mallet make a noticeable difference, and a basic set costs little.
Is a power drill better than a screwdriver?
It is faster, but only with a low torque setting. A drill driven too hard strips holes and splits panels, so finish by hand where unsure.
Do I need a spirit level?
It is strongly recommended for wardrobes, bookcases and anything with doors. A piece that leans slightly will not close or stand properly, and it can be a safety issue with tall items.