Grip range is the minimum and maximum total material thickness a rivet will clamp, and it is what decides whether the joint is actually tight.

The rivet forms its blind-side head by upsetting the body against the back face. That only happens if the material thickness falls inside the designed range.

Below the minimum, the head forms clear of the material and the joint stays loose even though the rivet looks set from the front.

Above the maximum, the mandrel breaks before the head has formed properly, and the joint has little strength.

Both failures are invisible from the accessible side, which is what makes them dangerous in a kit where the wrong rivet is easy to pick up.

A useful kit has overlapping grip ranges across its sizes so there is no thickness the box cannot handle.

A close fit - the diameter stated by the manufacturer, drilled cleanly and deburred.

The rivet body must fill the hole to clamp properly. An oversized hole lets the body expand sideways and the joint has play in it immediately.

Too tight and the rivet cannot be inserted, or is forced in and damaged before it is set.

Burrs on either face stop the flange and the formed head bearing flat, which loses clamp and can crack thin material.

Where existing holes are worn or oversized, a larger rivet or a large-flange type is the answer rather than the standard size.

Matched drill bits in the kit make this reliable; where they are absent, the required diameter is worth marking on each compartment.

Match it to the sheet where you can, and use stainless where the two parts differ or the joint is exposed.

Aluminium rivets are the general light-duty choice, easy to set by hand and suited to aluminium and thin sheet.

Steel rivets are stronger and need more force, which often means a lever or powered tool above the smaller diameters.

Stainless resists corrosion and is the usual answer outdoors, in washdown areas and wherever the two joined materials differ.

Mixing metals creates a galvanic couple at every hole, and a riveted panel has a great many holes, so the effect is cumulative rather than local.

The mandrel material matters too - a steel mandrel left in an aluminium rivet is itself a couple, which is why all-aluminium and all-stainless rivets exist.

One tool usually covers a range, but each diameter needs its own nosepiece, and the larger sizes need more force than a hand tool can give.

Hand riveters cover the smaller diameters comfortably and are hard work at the top of their stated range.

Lever, pneumatic and battery tools exist for larger diameters, for steel and stainless, and for any volume of work.

Nosepieces are consumable and size-specific. A kit whose supplied nosepieces do not cover every diameter in the box has sizes that cannot be used.

Structural and specialist rivets often need a dedicated tool rather than a general-purpose one.

Checking the tool's stated capacity against the largest rivet in the kit is worth doing before buying either.

Drill out the head with a bit the same size as the rivet body, then punch the remains through.

Centring the drill on the mandrel hole keeps it true. Drilling off-centre enlarges the hole in the parent material, which is the damage worth avoiding.

Drill only through the head. Once the head is separated, the body pushes out with a punch and the parts come apart.

Backing the material while punching prevents distortion, particularly in thin sheet.

If the hole has been enlarged, the replacement should be the next size up or a large-flange type rather than the same rivet again.

Closed-end and structural rivets are harder to remove because there is more material and, in structural types, a locked mandrel.

Where only one side is accessible, where a permanent joint is wanted, and where vibration would loosen a threaded fastener.

Blind rivets are set entirely from one face, which is their defining advantage and the reason they dominate panel, ducting and cladding work.

They are fast and repeatable, so a long seam is quicker to rivet than to bolt.

They do not loosen, because there is no thread to back off, which suits vibrating assemblies.

The trade-off is permanence: taking a riveted joint apart destroys the fastener and risks the hole.

Where a panel must be removed for service, threaded inserts or captive nuts are the better answer, even though they cost more to install.

Overlapping grip ranges across two or three diameters, a mix of body styles, and the nosepieces to set all of them.

Continuous grip coverage matters more than piece count, for the reasons the range itself exists.

A few closed-end rivets are worth having for any joint that must resist water, since an open rivet is a hole through the panel.

Large-flange rivets earn their place in soft, thin or previously damaged material where a standard flange pulls through.

Multi-grip rivets reduce how much range the kit needs to carry, at slightly lower strength than a size-matched rivet.

Matched drill bits, if included, remove the most common cause of a poor joint.