Use a built-in buttonhole function when your current machine already has one. A compatible mechanical buttonholer can add stitched buttonholes to a machine you want to keep. A buttonhole chisel, cutter or seam ripper only opens the slit after stitching; it is not an alternative way to sew the reinforcing edges.
That distinction comes before buying. “Separate buttonhole tool” can describe both a stitching attachment and a cutting tool, but they perform different operations.
Three ways to make the stitching
| System | Documented example | What you control |
|---|---|---|
| Four-step built-in buttonhole | Singer M1500 | Switch between the sides and end bars; mark the required length |
| One-step built-in buttonhole | Singer M3500 | Fit the button in the measuring foot, prepare the buttonhole lever and follow the machine’s sequence |
| Mechanical buttonholer attachment | Original Singer low-shank attachment documented below | Fit the correct attachment, feed-cover arrangement and size/template; the attachment guides fabric movement |
Singer documents a four-step function on the M1500 and a one-step function on the M3500 . “Built in” therefore does not mean automatic sizing on every machine. Singer’s one-step instructions explain the measuring foot, but the exact machine manual governs lever and stitch settings.
Both built-in approaches use a buttonhole foot and preparation. Calling them accessory-free understates the setup. Their advantage is that the machine’s own manual specifies the buttonhole operation.
A separate stitching attachment needs an exact match
The original Singer low-shank buttonholer instructions , preserved by ISMACS, describe a mechanical attachment rather than a slit cutter. It is an example of an add-on system with its own installation and feeding instructions, not evidence that an arbitrary buttonholer fits all modern machines.
Before buying a used attachment, identify its version, the supported machine/shank arrangement and whether the necessary mounting hardware, feed cover and templates are supplied. A missing accessory can turn a seemingly economical purchase into an incomplete system. A seller’s “fits Singer” claim is insufficient because Singer machines include different attachment arrangements.
An attachment is worth considering when a suitable existing machine lacks buttonholes or you specifically want its template system. It can also interest experienced garment sewists; sewing frequency does not establish that attachments are only for occasional work. Conversely, there is little reason to buy a whole replacement machine solely because you have not yet learned the usable buttonhole function on the one you own.
Compare a sample before committing the garment
Use scrap with the same fabric layers and interfacing as the finished button band. Make the chosen size, secure the stitching as the manual directs, open it carefully without cutting the end bars, and pass the actual button through. Test clearance and inspect for puckering or loose stitching. This is an acceptance method you can use, not a reported test of either system.
For several shirt-front holes, mark their centers and spacing before sewing. A one-step foot or repeated template helps with size; neither locates every hole along the garment for you. Keep fabric supported so its weight does not pull the marked position away.
Buying route
For a new general-purpose machine, choose its buttonhole controls alongside the seams, hems and fabric handling you need. The M1500 review and M3500 review explain those wider trade-offs.
For an existing supported machine, search Amazon for a Singer low-shank buttonholer , treating this as an exact-name search rather than a compatibility promise. Verify the version and completeness before purchase. Keep a cutting tool in either setup, because stitching and opening the buttonhole remain separate operations.