Klein Tools MSF100 Magnetic Stud Finder
- Material Type: N52 magnet, PC-ABS housing
- Item Weight: 0.11 pounds
- Color: Orange
- Level Measurement Type: bubble
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A durable, no fuss backup to a scanning stud finder that earns its place in a pack out bag, though it works best alongside a scanner rather than replacing one entirely.
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ASIN: B0DJPY94MCModel: MSF100Category: Stud Finders
Overview
The Klein Tools MSF100 is a compact, battery free magnetic stud finder and level that uses a rare earth magnet to detect metal fasteners in wood studs, with a felt pad backing, center notch and bubble vial for marking and alignment.
Instead of scanning for the stud itself, it locates the screws or nails already driven into it, which means there is no calibration step and no battery to die mid project. That also means it depends on a stud actually having a metal fastener near the surface to find, so it can miss studs with widely spaced or absent fasteners.
- Rare earth magnet detects metal fasteners in wood studs
- Felt pad backing protects drywall and plaster surfaces
- Center notch, bottom opening and bubble vial for marking
- Drop rated to 9.9 feet (3 m), no battery needed
Who it's for
Good for anyone who wants a pocket sized, battery free backup to a scanning stud finder, or a primary tool for quick jobs like hanging a picture or checking a wall before mounting something light. Less suited if the studs have no exposed nails or screws near the surface.
Pros and cons
- No batteries or calibration required
- Strong enough magnet to stick to the wall unaided
- Built in bubble vial for level or plumb lines
- Rated to survive drops up to 9.9 feet
- Only finds studs where a fastener sits near the surface
- Less useful on studs with no nails or screws
Performance notes
The rare earth magnet needs to be moved slowly across the wall until it catches on a screw or nail head, at which point it holds firmly enough to stick to the wall on its own; the felt pad backing then protects drywall and plaster while you mark with the center notch or bottom opening. The built in bubble vial lets you carry a level or plumb line across from that mark before drilling.
Specifications
| Brand | KLEIN TOOLS |
|---|---|
| Model | MSF100 |
| Dimensions & fit | |
| Item Weight | 0.11 pounds |
| Construction & materials | |
| Material Type | N52 magnet, PC-ABS housing |
| Color | Orange |
| Included components | |
| Unit Count | 1 |
| Included Components | Magnetic Stud Finder |
| Other details | |
| Level Measurement Type | bubble |
| Number Of Items | 1 |
| Item Type Name | Magnetic Stud Finder |
| Style Name | 1-Pack |
| Operation Mode | Manual |
| Level Measurement Units | degree |
Closest rivals on specs
CH Hanson 03040 Magnetic Stud Finder- Item Weight 0.11 vs 0.13 pounds (-15%)
eOUTIL ST100 Stud Finder Wall Scanner- Item Weight 0.11 vs 0.2 pounds (-45%)
Frequently asked questions
Does the Klein Tools MSF100 find the stud directly or something else?
It locates metal fasteners, such as screws or nails, already in the stud using a magnet, which indicates where the stud is behind the wall.
Does the Klein MSF100 stud finder need a battery?
No, it works purely with a rare earth magnet and has no electronics or battery to replace.
What is the bubble vial on the Klein MSF100 for?
It lets you check level or plumb once you have marked a fastener location, using the center notch and bottom opening to align your line.