Functional 3D files for oddly specific needs.
Exact-size holders, organizers, mounts, and utility parts that are too niche for someone to model one by one — free STL and STEP downloads, digitally validated before they're published.
Categories
Organizers & Trays
Boxes and trays sized for one specific item or drawer, not a generic size that's almost right.
Grid Storage
Gridfinity-compatible baseplates and bins, including sizes and combinations most sellers don't stock.
Holders & Stands
Racks and trays that hold a specific item — vials, bottles, batteries, tools — at the exact diameter and count you need.
Spacers & Adapters
Fit-critical dimensional parts: spacers, hubs, and adapters built to one stated measurement.
Simple Mounts
Mounting plates and brackets built to an exact, stated hole pattern — official spec where one exists.
Browse objects
30 objectsSearch by name, use case, or category. Every result links to its dimensions, 3D preview, and downloads.
AA Battery Holder Tray — 30-Cell 5×6 Array
A tray that holds 30 AA batteries upright and organized in a 5×6 grid, for bulk battery storage in a count that doesn't match the fixed 16/20/25-count presets sold as ready-made holders.
117×97.5×33mm
AAA Battery Holder Tray — 24-Cell 4×6 Array
A tray that holds 24 AAA batteries upright and organized in a 4×6 grid, for bulk battery storage sized exactly to AAA's own diameter rather than a generic multi-size battery organizer.
93×62×28mm
C Battery Holder Tray — 15-Cell 3×5 Array
A tray that holds 15 C-cell batteries upright and organized in a 3×5 grid, for bulk battery storage in a count that doesn't match the fixed 8/12-count presets sold as ready-made holders.
156×93.6×33mm
D Battery Holder Tray — 10-Cell 2×5 Array
A tray that holds 10 D-cell batteries upright and organized in a 2×5 grid, for bulk battery storage in a count that doesn't match the fixed 8/12-count presets sold as ready-made holders.
196×78.4×38mm
Manga Slipcase for 135×15×215mm Book
A protective slipcase sized to slide over one specific book/manga volume (135mm deep, 15mm thick, 215mm tall), so it fits snugly instead of using a generic case that's the wrong size for this exact volume.
137×17×216mm
Ribbed Tray, 185×90×12mm (5-Rib Fixed Version)
A shallow ribbed tray (185×90×12mm) for organizing small flat items, with 5 evenly-spaced parallel ribs dividing the tray into compartments.
185×90×12mm
Business Card Tray — Standard 88.9×50.8mm Card Stack
A shallow open tray sized to hold a flat stack of standard US/Canada business cards (88.9×50.8mm), for a reception desk or drawer -- a flat stacking tray, not an upright display stand.
95×57×15mm
Chapstick & Lip Balm Holder — 16-Tube 4×4 Tray
A tray that holds 16 chapstick or lip balm tubes upright and organized in a 4×4 grid, in a count between the 10-tube and 64-tube products sold as ready-made organizers.
108×108×38mm
CR2032 Coin Cell Holder Tray — 24-Cell 4×6 Flat-Lay Array
A flat-lay tray that holds 24 CR2032 coin cell batteries visible and organized in a 4×6 grid, in a count that doesn't match the fixed 10/15/17-count presets sold as ready-made holders or dispensers.
150×100×7mm
10ml Boston Round Bottle Holder — 12-Bottle 3×4 Rack
A rack that holds 12 standard 10ml Boston Round bottles (the common format for e-liquid, dropper, and cosmetic bottles) upright and organized in a 3×4 grid, in a count between the 10-bottle and 21-bottle products sold as ready-made holders.
116×87×28mm
Gridfinity 4×3 Bin Base, 23U Tall (167.5×125.5×161mm)
A tall Gridfinity-compatible storage bin (4×3 grid footprint, 23 units tall) for a toolbox-style build where standard bin heights are too short.
167.5×125.5×161mm
Gridfinity Baseplate — Custom 4×3 (168×126mm)
A Gridfinity baseplate at a non-stock 4×3 unit size (168×126mm), for fitting a small or irregular drawer that doesn't match common preset baseplate sizes.
168×126×4.4mm
Gridfinity 1×1 Bin — Loose Electronics Component Storage
A single-cavity 1×1 Gridfinity bin (21mm deep) for loose storage of one small-parts type (e.g. one resistor or capacitor value) per bin, sized to the standard Gridfinity grid so it drops into an existing baseplate.
41.5×41.5×21mm
Gridfinity 2×2 Bin — Loose Hex/Allen Key Storage
A single-cavity 2×2 Gridfinity bin (28mm deep) for loose storage of a hex/Allen key set, sized to the standard Gridfinity grid so it drops into an existing baseplate.
83.5×83.5×28mm
Gridfinity 2×1 Bin — Loose USB/SD Card Storage
A single-cavity 2×1 Gridfinity bin (21mm deep) for loose storage of USB flash drives or SD/microSD cards, sized to the standard Gridfinity grid so it drops into an existing baseplate.
83.5×41.5×21mm
1/4in Hex Bit Holder — 24-Bit 4×6 Desk Tray
A desk-scale tray that holds 24 standard 1/4in hex-shank driver bits upright and organized in a 4×6 grid, at a smaller scale than the bulk wall-mounted 72-bit organizers sold for workshop use.
74.04×49.36×28mm
Vial Holder Tray — 20× 18mm Vials, 4×5 Array
A tray that holds exactly 20 cylindrical vials (18mm diameter, 60mm tall) upright and stable in a 4×5 grid, for lab/craft/storage use where no off-the-shelf rack matches this vial size and count.
115×92×21mm
5/8in Marker Holder — 20-Slot 4×5 Desk Organizer
A desk organizer that holds 20 markers upright in a 4×5 grid, sized for markers with a 5/8in (15.875mm) barrel -- a different, chunkier diameter than slimmer pens/highlighters.
104.38×83.5×43mm
OPI-Size Nail Polish Rack — 15-Bottle 3×5 Tray
A tray that holds 15 nail polish bottles upright in a 3×5 grid, sized specifically for OPI-diameter bottles (~32mm), for a mid-size collection between small desk trays and 72+ bottle modular racks.
185×111×23mm
3D Printer Nozzle Holder Tray — 8-Nozzle 2×4 Array
A standalone tray that holds 8 standard M6 3D-printer nozzles (V6, MK8, and similar) upright and organized in a 2×4 grid, for makers who want their spare nozzles sorted without needing an existing Gridfinity system.
43.2×21.6×10mm
Citadel Paint Pot Rack — 25-Pot 5×5 Array
A rack that holds 25 Citadel/Games Workshop-style paint pots upright and organized in a 5×5 grid, in a count that doesn't match the fixed 15/20-pot presets sold as ready-made racks.
195×195×28mm
18mm Pen & Marker Holder — 24-Slot 4×6 Desk Organizer
A desk organizer that holds 24 pens/markers/paintbrushes upright in a 4×6 grid, sized for 18mm-diameter items, at a count between the two standard preset sizes sold ready-made.
138×92×73mm
Playing Card Deck Box — 2-Deck Poker-Size Tray
A flat storage box that holds two standard poker-size playing card decks (63.5×88.9mm each), side by side in separate compartments, for card players and board-game collections that overflow their original paper boxes.
95×143×20mm
Raspberry Pi 4B Wall Mounting Plate — 58×49mm Hole Pattern
A flat wall-mounting plate with 4 holes at the Raspberry Pi 4 Model B's official mounting hole spacing (58×49mm, 2.7mm diameter for M2.5 screws), for screwing a Pi board directly to a wall or panel.
80×70×4mm
2.5in SSD/HDD Mounting Plate — SFF-8201 Hole Pattern
A flat mounting plate with 4 holes at the official SFF-8201 side-hole spacing for a 2.5in SATA drive, for screwing an SSD or HDD directly to a chassis, DIN rail bracket, or custom enclosure.
80×95×3mm
16mm Test Tube Holder — 8-Tube 2×4 Rack
A rack that holds 8 test tubes upright and stable in a 2×4 grid, sized for 16mm-diameter tubes, for lab/hobby use at a specific tube size and count not matched by a generic rack.
84×42×28mm
1/4-20 Tripod Adapter Plate — Universal Spacer
A flat plate with a single clearance hole for a standard 1/4-20 UNC tripod screw, for adding spacing between a tripod head and a camera or device, or as a simple pass-through mounting plate. This is a plain clearance hole, not a threaded socket or a locking quick-release mechanism.
50×50×5mm
VESA 100×100 Mounting Plate — Official Hole Pattern
A flat adapter plate with 4 holes at the official VESA MIS-D 100×100mm hole spacing, for mounting a monitor/panel-compatible device to any VESA-standard arm or bracket.
120×120×5mm
Vial Holder Tray — 9× 22mm Antibody/Dye Vials, 3×3 Array
A tray that holds 9 cylindrical 22mm-diameter glass vials upright and stable in a 3×3 grid, sized for lab vials used for antibodies or dyes, where a published single/double holder doesn't cover a larger batch.
81×81×18mm
Wine Cork Storage Tray — 20-Cork 4×5 Array
A tray that holds 20 standard wine corks upright and organized in a 4×5 grid, for collectors and home winemakers who save corks and want them stored (not loose in a drawer or jar).
145×116×23mm
Why MyMakerPilot
Exact fit, not close enough
Every object is built to a stated dimension or count, not squeezed from a generic template that's almost the right size.
Digitally validated before publishing
Geometry, dimensions, and manifold checks run on every model before it goes live — see the validation section on each object page.
Free STL and STEP, every time
Every model ships as both file formats. No account, no paywall, no watermark.
How it works
- 1
Find your object
Search by name or use case, or narrow down by category.
- 2
Check the fit
Confirm the exact dimensions and any stated assumptions on the object page.
- 3
Download and print
Grab the STL or STEP file and print it — no sign-up required.