I'm confused. The gang box sticks out a half inch from the studs. How do you install the drywall without first cutting the hole?

the box is only 1/4inch past studs. not 1/2. the drywall will just float over the box. so when you hang the drywall, only use 3 or 4 screws- just enough to hold it in place. then use the magnet to find your box, and cut it out. then finish screwing in the drywall. This tool works great. i just did an entire house with absolutly zero problems

Will it work through osb

On the back of the box it says the following:"Works on drywall, plywood, particle board, laminated flooring, Masonite, exterior siding, cement board, tile, and slate."Thanks,General Tool

What tool are you using to cut the sheet rock i feel like a dremel would cut right through the metal wire being used to hold the magnet to the box

Commercial drywallers use drywall routers/Rotozips(large Dremels spinning at 9000rpm). But you can use anything. You will not come in contact with the inside of the box, maybe the tabs of the outside of box. The outside marker magnet is larger than the inside box magnet and spring tabs. If you are worried about even touching the outside tabs of an electrical box, set your depth on the bit to that of the drywall.

Does the electrical box have to be empty

With this kit, yes the box would need to be empty, but they also make something called a plug mark that plugs into an existing wall outlet. Of course that doesn't work for light switches. But there is always lipstick for those.http://www.amazon.com/gp/product/B00XUY9FB8?psc=1&redirect=true&ref_=od_aui_detailpages02

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Calculated Industries 8105 Blind Mark Drywall Electrical Box Locator Tool – Powerful Rare-Earth Magnetic Targets (3) and Locator Kit | Powerful Rare-Earth Magnetic Targets, 3 Targets and Locator Included

Calculated Industries 8105 Blind Mark Drywall Electrical Box Locator Tool – Powerful Rare-Earth Magnetic Targets (3) and Locator Kit | Powerful Rare-Earth Magnetic Targets, 3 Targets and Locator Included

Product ID: 15936543

Details

Brand
Calculated
Is Electric
Yes
Item Weight
1 Pounds
Material
Hard Plastic
Number of Pieces
1
Power Source
Hand Powered

📦Locate multiple electrical boxes at once

🧲3 powerful rare-earth magnets

⏱️Cut drywall openings 2x faster

B/.115

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Description

🧲 Cut Perfect Openings Faster—No Measuring, No Mistakes!

DOUBLE YOUR SPEED - Complete electrical box markings and cutouts twice as fast, slashing project time and fatigue.
ALL IN ONE PRO KIT - Includes 3 target magnets, locator, and rugged case—stay organized and ready for any project.
LIFT LESS DO MORE - Install drywall with half the lifting—cut once, install once, reducing strain and damage risk.
MULTI SURFACE MASTERY - Works seamlessly on drywall, plywood, cement board, tile backsplashes, and more for versatile jobsite use.
PRECISION WITHOUT THE TAPE - Eliminate measuring errors with patented magnetic alignment for flawless drywall cutouts every time.

The Calculated Industries 8105 Blind Mark Locator Kit uses three powerful rare-earth magnets to precisely locate electrical boxes behind drywall and other materials, enabling twice as fast and error-free cutouts without measuring. Designed for professionals and DIYers alike, it reduces lifting, speeds installation, and works across multiple surfaces, all packed in a durable carrying case.

Specifications

ASIN	B00YX8KZGO
Best Sellers Rank	#61,221 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #138 in Electrical Boxes
Brand Name	Calculated Industries
Customer Reviews	4.6 4.6 out of 5 stars (3,376)
Included Components	Includes 3 target magnets, 1 target locator magnet, and a rugged carrying case
Is Electric	Yes
Item Type Name	Calculated Industries 8105 Blind Mark Drywall Electrical Box Cutout Tool – Powerful Rare-Earth Magnetic Targets (3) and Locator Kit
Item Weight	1 Pounds
Manufacturer	Calculated Industries
Manufacturer Part Number	8105
Material Type	Hard Plastic, Metal
Model Number	8105
Number of Pieces	1
Power Source	Hand Powered
Recommended Uses For Product	Drywall installation, electrical box cutouts, locating outlet boxes, paneling installation, plywood installation, particle board installation, laminated flooring installation, exterior siding installation, cement board installation, tile backsplash installation, slate installation
Style Name	Locator Tool
UPC	854979001007 785577173264 723434515680 785533856187 796084335670 733353688501 787721523956 098584001735
Unit Count	1.0 Count

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B/.115

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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