When I first started 3D printing, I thought the printer itself was basically all I needed. Just plug it in, load some filament, hit print, right? Within about a week I'd scratched my bed with pliers trying to remove a print, ruined a nozzle by not knowing how to clear a clog, and wasted half a roll of filament that had absorbed moisture from sitting in my humid closet.
I learned the hard way so you don't have to. The tools and accessories I'm about to share aren't extras or nice-to-haves — they're the things that actually make 3D printing work well. Some of them cost almost nothing. Some are a small investment. All of them earn their place on the bench.
This isn't a list of everything that exists — it's the stuff I actually reach for regularly, recommended by someone who's used them, broken them, replaced them, and figured out what's actually worth buying.
Dykes / Flush Cutters
These go by a lot of names — dykes, flush cutters, diagonal cutters, side cutters — but they all describe the same essential tool: a small pair of pliers with a flat cutting face that snips cleanly and flush to a surface. If there's one tool on this list I consider non-negotiable, this is probably it.
The main use is clipping filament cleanly when loading or unloading — you want a clean diagonal cut at the end of the filament so it feeds into the extruder smoothly. But you'll also use them constantly for trimming stringing off prints, snapping off support material, cutting the blob of filament that oozes from the nozzle before a print starts, and general cleanup work.
You can get a perfectly functional pair for under $10, and I'd recommend having two — one dedicated to filament cutting (keep it sharp) and one for general cleanup. Trust me, once you have them you'll wonder how you ever managed without.
Digital Calipers
A digital caliper is the tool that separates hobbyists who print decorative things from hobbyists who print things that actually fit, function, and integrate with the real world. It measures dimensions to 0.01mm accuracy, which is overkill for most purposes — but that precision matters when you're designing parts that need to fit other components.
I use my calipers almost every printing session. Checking that my printed parts match their intended dimensions. Measuring the real diameter of my filament before dialing in extrusion multiplier. Verifying that a hole I designed for a bolt is actually the right size before I waste time printing the full model. Measuring the magnet I'm designing a pocket for. The list goes on.
A cheap set from Amazon for $10–15 works fine for this hobby. You don't need Mitutoyo precision. But get them with a digital readout rather than a dial — so much easier to read quickly.
Isopropyl Alcohol (IPA)
This humble bottle of rubbing alcohol might be the most-used consumable on my bench, and it costs almost nothing. Clean bed adhesion depends entirely on a clean bed surface, and over time your fingers, ambient dust, and residual adhesives leave an invisible film on the print surface that causes prints to delaminate, warp, or fail to stick at all.
IPA cuts through all of it. Before every print, I give the bed a quick wipe with a paper towel dampened with 90%+ IPA and let it dry for 30 seconds. That's it. That simple habit eliminates a huge percentage of bed adhesion problems that beginners suffer through.
Get 90% or higher concentration — the lower percentages have too much water in them and are less effective. A bottle will last you months of regular printing.
Hyper Lock Bed Glue
I'll be honest: for the first year or so of printing in PLA, IPA alone was enough for me and I thought bed glue was for people with inferior printers. Then I started printing PETG regularly, and I ate some humble pie.
Some materials just don't play nice with certain bed surfaces. PETG, for example, will bond to PEI sheets so strongly it can pull chunks of the coating off when you try to remove prints — a genuinely heartbreaking experience the first time it happens. Hyper Lock bed glue (and similar products from brands like Magigoo) creates a controlled adhesion layer: strong enough to hold during printing, but formulated to release cleanly once the bed cools. It's also water-soluble, so cleanup is just a damp cloth.
I now keep a bottle on the bench as a matter of course. It's also great insurance for PLA and PETG on glass beds, large flat prints prone to warping, and any print where failure would mean wasting a lot of filament on a long job.
Magnetic PEI Sheet
If your printer didn't come with one of these, this is probably the single most impactful accessory upgrade you can make. A magnetic PEI (Polyetherimide) sheet is a flexible spring steel sheet coated with a textured PEI surface that attaches magnetically to your heated bed.
Why does this matter so much? Two reasons. First, PEI has excellent natural adhesion for PLA and PETG without any glue or hairspray needed — prints stick during printing and release when the sheet flexes. Second, and this is the part I love most, you can pop the sheet off the printer, flex it slightly, and prints just ping off. No tools, no prying, no scratching the surface trying to get your print off. Just flex and release.
These are available for almost every popular printer size and typically run $20–40. If your printer came with a glass bed or a basic non-removable surface, this upgrade will change your printing experience dramatically.
Wire Brush for Nozzle Cleaning
Every printer operator eventually deals with carbonized filament residue building up on the outside of the nozzle. It looks like dark crust or burnt material around the tip, and if you let it accumulate, it can drip onto your prints and cause defects, or eventually interfere with the nozzle's ability to heat evenly.
A small brass wire brush (the kind often sold for cleaning soldering irons) is perfect for this. Heat the nozzle to printing temperature, then brush the exterior gently while it's hot. The residue brushes right off. Brass bristles are important here — steel bristles can scratch and damage the nozzle coating. Takes about 30 seconds and keeps your nozzle in good shape for much longer.
I do a quick nozzle brush every few prints, and a thorough one whenever I notice buildup. It's one of those tiny maintenance habits that pays dividends in print quality over time.
Acupuncture Needles for Clogs
This one sounds a little unusual until the first time you're dealing with a partially clogged nozzle and you understand exactly why it's genius.
When a nozzle is clogged or partially blocked, the instinct is to jam something in from the top or try to push it through. But the right approach is to clear it from the nozzle tip while it's hot. Acupuncture needles are thin enough to fit inside standard 0.4mm nozzle openings and are made of medical-grade steel — strong enough not to break off inside your hotend. You can buy a pack of 100 for a couple of dollars.
Heat the nozzle to temperature, then gently insert the needle into the nozzle tip with a twisting motion. Work it back and forth to break up and dislodge the clog. Then purge some filament through. In my experience this clears the majority of soft clogs that aren't full hardened blockages, and it's way less disruptive than doing a cold pull or disassembling the hotend.
Keep a few in a small container on your printer shelf. You'll be glad they're there.
A Few Honorable Mentions
Beyond the must-haves above, a few more things I'd suggest picking up as you get deeper into the hobby: a good pair of needle-nose pliers for grabbing filament in tight spots and pulling support material, a set of hex keys beyond what came with your printer (the included ones are usually poor quality), and some silicone heat-resistant gloves for handling prints fresh off a hot bed.
None of these need to cost much. The entire toolkit I've described here can be assembled for well under $100 total, and it'll cover 99% of what you'll need in your first couple of years of printing.
Build your toolkit gradually as you discover what you actually need — but start with the flush cutters, the calipers, and the IPA. From day one, those three will earn their place.
— Built up over years of printing, one frustrating lesson at a time.