Will these hold the weight of an approx 8kg guitar on plasterboard

Not suitable for plasterboard on a stud partition. They are excellent for use on any solid substrate (concrete, brick, block etc).

Can the screw be longer than the anchor. The anchor is going into 6cm wood panelling

I'm not sure these fixings are the right answer for wood panelling. Are you aiming to drill through to the wall behind the panelling? If not and you are relying on fixing into the wood, I don't see the advantage of using fixings rather than wood screws. I also think these might split the panelling as they expand sideways during tightening.

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fischer DuoPower 8 x 65, powerful universal plug with intelligent 2-component technology for fastenings in concrete, bricks, stone, etc., 50 plugs without screws

Product ID: 54753854

Details

Brand
fischer
Colour
Item weight
0.16 Kilograms
Material
Wood
Product dimensions
8W x 65H

🧩fits all building materials

⚙️3-in-1 auto-adjust tech

🏗️max load transfer

C$847

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Description

🔧 Secure your space with the smartest plug in the room!

UNMATCHED LOAD CAPACITY - Engineered for highest load transfer ensuring rock-solid, reliable fixings every time.
SLIP ROTATION RESISTANT - Narrow rim and anti-rotation features guarantee precise, hassle-free installation.
ADAPTIVE 2 COMPONENT DESIGN - Automatically expands, folds, or knots to perfectly grip concrete, brick, stone & more.
VERSATILE APPLICATION RANGE - Ideal for mounting shelves, curtain rails, electronics, and decorative fixtures on diverse surfaces.
BULK PACK FOR PROFESSIONALS DI YERS - 50 plugs included, perfectly matched with screws for seamless project flow and value.

The fischer DuoPower 8 x 65 is a universal, intelligent 2-component plug designed for fast, secure fixings in a wide range of building materials including concrete, bricks, and stone. Featuring automatic adjustment through expanding, folding, and knotting mechanisms, it delivers the highest load transfer with anti-slip and anti-rotation technology. Supplied in a convenient pack of 50 plugs, it’s the go-to solution for professionals and DIY enthusiasts seeking reliable, versatile anchoring.

Specifications

ASIN	B01N7TIWTD
Best Sellers Rank	493 in DIY & Tools ( See Top 100 in DIY & Tools ) 12 in Anchors
Brand Name	fischer
Country Of Origin	China
Customer Reviews	4.8 4.8 out of 5 stars (8,130)
Global Trade Identification Number	04048962262186
Included Components	Inhalt: 1 Stück
Item Type Name	DuoPower-DIY
Item Weight	0.16 Kilograms
Manufacturer	FISCHER
Manufacturer Part Number	538251
Model Number	538251
Number Of Items	1
Product Warranty	2 year manufacturer.
Unit Count	50.0 count

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C$847

Duties & taxes included

In stock

Sold byAmazon NicaraguaDelivered 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 Nicaragua.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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