Maxmartt 29PCS Rotary Multi Tool Cutting Guide Attachment Kit,Lots Rotary Multi Tool Cutting Guide Hss Router Drill Bits Attachment Small Electric Grinding Sandpaper Combination Accessories

First impressions

A rotary tool is only as good as its accessories, and I picked up the Maxmartt 29‑piece rotary kit to see if a budget-friendly, all-in-one set could handle light routing, carving, and sanding jobs in the shop. I used it across a few projects—chamfering the edges of small plywood trays, carving shallow recesses in pine, and cleaning up 3D-printed plastic—and focused on two things: how useful the depth guide actually is, and whether the included burrs and sanding drums are worth keeping in the case.

What you get and how it fits

The kit groups into three categories:

• An adjustable routing/cutting guide with a large window and depth stop rated to 19 mm (3/4 in)
• A selection of 1/8 in shank high-speed steel (HSS) burrs and bits in various profiles
• Two mandrels (large and small) plus 120‑grit sanding bands to fit each size

Everything in the kit uses a 1/8 in shank, so it dropped right into the standard collet on my rotary tool without drama. The guide attaches at the tool’s nose in place of the standard collar; on my Dremel-style body it threaded on securely, and on a generic rotary tool I tested it with, it needed the supplied adapter to seat square (included in the kit).

The overall build is mostly plastic with a metal depth screw. It’s not premium, but the parts arrived straight, threads were clean, and nothing felt brittle out of the box.

The routing/cutting guide

The guide is the main reason to consider this set, and it’s genuinely helpful for controlled, shallow work. The depth adjustment reaches the advertised 19 mm and locks down with a simple screw collar. I measured the travel with calipers and set it to 5, 10, and 15 mm for test cuts; the stops were repeatable enough for hobby work, though not precise to the fraction of a millimeter. The large window provides good visibility of the work area, and the base sits flat without rocking.

Two caveats:
- The depth stop can creep if you haven’t snugged the collar firmly. On my first pass chamfering plywood at about 12,000 RPM, the stop moved slightly after a minute of side load. Re‑tightening solved it.
- There are no clear depth markings. If you need accuracy, measure the bit protrusion with a ruler or calipers before each cut.

For freehand inlays, chamfers on small boxes, and slotting for hardware in softwood, this guide makes a rotary tool far more manageable than just floating the bit over the work.

Burrs and cutting performance (wood and plastic)

The included HSS burrs are a mixed but usable set. Profiles cover the basics—cylindrical, tapered, spherical—and they fit typical carving tasks. In pine and poplar, they cut cleanly at 15,000–20,000 RPM, removing material predictably without much chatter. For chamfers, the straight‑sided burr with the guide set to a fixed depth worked well, producing even edges that needed only a quick pass with sandpaper.

In hardwood (maple), the burrs cut but loaded up faster and showed more burnishing. You can still use them, but be patient and keep your passes light. In plastics (PLA and acrylic), they worked best at lower speeds (8,000–12,000 RPM) to avoid melting. I found a touch of mineral spirits on the bit between passes helped clear plastic buildup.

Edge quality is decent, but these are not fine-detail jeweler’s burrs. If you’re carving intricate reliefs or working in hardwood day in, day out, you’ll want sharper, longer-lasting cutters. For occasional DIY shaping, slotting, and beveling, they hold up as expected for HSS at this price point.

Sanding drums and surface prep

The kit includes two drum sizes with matching 120‑grit bands. Installation is straightforward: slip the band on, tighten the mandrel screw until the rubber expands, and you’re set. On softwood, the drums remove machine marks quickly and are excellent for smoothing inside curves. I used the small drum to ease finger holds on a plywood tray and the large one to fair the outside of a pine template.

A few notes from use:
- Only 120‑grit bands are included. They’re fine for cleanup but not for final finish. Expect to follow with 180–220 grit sheets.
- Bands can slip if you don’t tighten the mandrel enough. Tighten until the band won’t rotate under finger pressure.
- On PLA prints, the drums do a nice job of knocking down layer lines. Keep the speed modest and let the abrasive do the work to avoid melting.

Durability is fair. After a few minutes on hardwood edges, bands heat up and glaze. Flip or swap as needed—this is normal for small drums, but it’s something to plan for if you have a lot of footage to sand.

Control, ergonomics, and visibility

Using the guide transforms the rotary tool from “skittish” to controllable, especially on flat surfaces. The base footprint is compact enough to see your layout lines, and the open window is genuinely helpful. I prefer to grip the tool body with one hand and use the other on the guide to steer—this reduces tilt and maintains consistent depth.

Without the guide, the burrs are best for quick touch-ups, edge breaking, and inside corners where the base won’t reach. I didn’t notice excessive runout in the mandrels or burrs; they spun true enough to avoid chatter at typical working speeds.

Speed and heat

The kit is rated to 28,000 RPM, and the components withstood that in testing, but most tasks run better slower. My general settings:
- Softwood carving: 15,000–20,000 RPM
- Hardwood chamfering: 12,000–15,000 RPM with lighter passes
- Plastics: 8,000–12,000 RPM to keep temperatures down
- Sanding drums: 10,000–15,000 RPM; higher speeds glaze the abrasive faster

Heat is the enemy for both burr edge life and sanding bands. Short passes and clearing dust frequently help.

Durability and maintenance

After several sessions, the guide threads remained smooth, and the base didn’t warp. The HSS burrs dulled predictably—more quickly in maple than pine. They can be refreshed with a light touch on a diamond card, but at this price you’ll likely replace rather than sharpen. The mandrels held up fine, though I re-tightened the large one once after it loosened mid-task.

Keep a small brush on hand to clear chips from the guide window and a drop of dry lube on the depth screw if it begins to feel gritty.

Where this kit shines

• Adding controlled bevels and chamfers to small boxes, picture frames, and jigs
• Shallow recesses and slots for hardware in softwood and plywood
• Touch-up shaping and cleanup on 3D-printed parts and soft plastics
• Hobby carving where precision is “layout‑line accurate,” not machinist‑grade

Where it falls short

• Fine detail carving or heavy stock removal in hardwoods
• Work that demands precise, repeatable depth settings without measuring
• Finish sanding workflows (only 120‑grit bands included)
• Metal work—HSS burrs here are oriented to wood and plastic

Tips to get better results

• Measure depth with calipers or a ruler each time you change bits; don’t rely on eyeballing the stop.
• Use painter’s tape on your work as a visual guide for chamfers and to reduce tear-out along edges.
• For plastic, drop the speed and make light passes; clear chips often to avoid melting.
• Tighten mandrels firmly and test the band by trying to twist it by hand before powering up.
• Wear eye protection and a dust mask; a small vacuum or dust blower keeps the guide window clear.

The bottom line

The Maxmartt 29‑piece rotary kit does what it sets out to do: it makes a small rotary tool more controllable for light-duty routing, carving, and sanding in wood and plastic. The adjustable guide is the standout—it’s simple, effective, and boosts accuracy over freehand use. The included HSS burrs and sanding drums are competent for hobby work, with the expected limitations in hardwoods and fine finishing.

Recommendation: I recommend this kit for DIYers and hobbyists who want an affordable way to add depth control and a basic assortment of cutters to their rotary tool. It’s a practical starter or backup set that covers common shaping and cleanup tasks without fuss. If your work leans toward precision inlays, extensive hardwood carving, or production-level consistency, invest in a heavier-duty plunge base and higher-grade burrs; otherwise, this kit is a useful, budget-friendly addition to the drawer.