Buy the FLYBIRD WB5 if the bench sits under a barbell — it is the one with a published ASTM rating and it folds flat when you are done. Buy the Finer Form if the bench is your main station and you want back extensions and Roman chair work from the same footprint.
The difference in one table
| FLYBIRD WB5 | Finer Form multi-function |
|---|
| Rated capacity | 800 lb, ASTM-certified | Not published as certified |
| Adjustment | FID (flat / incline / decline) | FID (flat / incline / decline) |
| Extra stations | None | Back extension, Roman chair, ab work |
| Leg anchor | Standard | Yes — required for its extra stations |
| Storage | Folds flat | Stays assembled |
| Backrest | 30 in | Not published |
What the ASTM rating actually means
This is the single most important line in that table, and it is routinely misunderstood. A manufacturer capacity number is a claim the manufacturer makes about its own product. An ASTM certification means the bench was tested against a published external standard.
For a bench specifically, that matters more than it does for most gym equipment, because a bench is the one object you are lying underneath with a loaded bar over your chest. A frame failure there is not an inconvenience. When two benches quote similar numbers and only one of them was tested against a standard, that is not a close call — and it is why the FLYBIRD ranks where it does in our bench roundup.
The Finer Form is not thereby unsafe; it simply does not publish a certification, so you are trusting the brand rather than a standard. Where that lands for you depends on how heavy you press.
What the extra stations are worth
The Finer Form is a bench, a back-extension and a Roman chair in one frame. In a small room that is a genuine argument — those are three pieces of equipment, and posterior-chain and core work is exactly what a barbell-only home gym tends to neglect.
The honest counter is that multi-function equipment is a compromise at every function. A dedicated back-extension is better at back extensions. And every extra station is more hardware, more adjustment points and more things to loosen over a decade — which on a buy-it-for-life site is a real cost, not a theoretical one.
So the question is not which bench is better. It is whether you will genuinely use the extra stations. If you will, the Finer Form is excellent value in floor space. If you will not, you are buying complexity you have to maintain.
The storage difference
The FLYBIRD folds flat. The Finer Form stays assembled, because a Roman chair cannot fold into nothing. In a garage that doubles as a garage, that is decisive — and it is covered further in the best folding benches.
Note the trade folding always involves: a hinge is a moving part, and moving parts develop play. A folding bench asks you to accept a joint in exchange for the floor space. A fixed frame has fewer places to loosen. Neither is wrong; they are different bets.
Which to buy
Buy the FLYBIRD WB5 if you own or plan to own a barbell and a rack, if you press heavy enough to care about a tested rating, or if the bench has to disappear between sessions. For most people building the setup described in our beginner guide, this is the right bench.
Buy the Finer Form if the bench is the center of your training rather than an accessory to a rack, if you want posterior-chain and core stations without buying more equipment, and if it can stay set up permanently.
If neither fits — because you want the highest published number rather than the certified one — the RitFit publishes 1,300 lb and the K KiNGKANG publishes 1,050 lb in a folding frame. Both are covered in what bench capacity actually means.
