Fischer Duopower wall plugs in box quantities. Two-component nylon construction works in solid and hollow substrates, expanding, folding or knotting depending on what it meets. Available in sizes from 5 x 25mm up to 14 x 70mm.
Size
QTY
Price
QTY
5 x 25mm
100
£2.95£3.54
5 x 25mm
100
£2.98£3.58
6 x 30mm
120
£2.95£3.54
6 x 50mm
100
£4.92£5.90
8 x 40mm
120
£3.95£4.74
8 x 65mm
50
£3.47£4.16
10 x 50mm
50
£4.90£5.88
10 x 80mm
25
£4.69£5.63
12 x 60mm
25
£3.67£4.40
14 x 70mm
20
£5.76£6.91
Fischer Duopower wall plugs are a two-component universal fixing designed to perform reliably across a wide range of substrates. Whether you are fixing into solid concrete, brick, perforated block or plasterboard, the same plug adapts its behaviour to suit the material it meets. For anyone who regularly works across different wall types, that removes the need to carry multiple plug types on site. These fischer wall plugs are available in box quantities, making them a practical choice for trade use where volume matters.
The Duopower works using a dual-material nylon construction. The outer body is firm enough to hold position during installation, while the inner core is softer and more flexible. In solid materials, the plug expands outwards against the drill hole walls in the conventional way. In hollow materials or cavities, it folds or knots behind the wall face, creating a positive mechanical lock that a single-material plug simply cannot replicate. The result is consistent holding performance regardless of what the wall turns out to be once you start drilling.
What Makes Fischer Duopower Wall Plugs Worth Knowing About
A few design details set these apart from a standard plug. The plug rim is narrow, which prevents the plug from slipping back into the hole during screw installation. That might sound like a small thing until you have lost a plug inside a freshly drilled hole in a tiled wall. The serrated profile along the body resists rotation as the screw is driven in, keeping the plug in position rather than spinning with it.
The plug length is deliberately kept short. That means shorter drill holes, less dust, and faster turnaround on repetitive jobs. There is also a tactile feedback mechanism built in: the plug gives a noticeable resistance at the point of correct seating, so you know it is fully home without guessing. On a job with fifty fixings to make, that kind of confidence in each one adds up.
Push-Through and Positioned Installation
The Duopower supports both positioned and push-through installation methods. Push-through installation means the plug and fixing can be offered up and driven through the material in one go without pre-positioning, which saves time on softer substrates. Positioned installation, where the plug is placed first and the screw driven in separately, works across harder materials. The same plug handles both approaches without modification.
Fischer Duopower wall plugs are sold here in full box quantities across a range of sizes from 5 x 25mm through to 14 x 70mm, covering light-duty fixings up to heavy structural applications. Box quantities vary by size, from 25 pieces for the larger sizes up to 120 for the smaller ones. Whether you are restocking a van or buying for a specific job, there is a size and quantity to match. Fischer is one of the few brands where the universal plug genuinely earns that label rather than just claiming it on the packaging.
Pro Tip: If you are unsure whether a wall is solid or hollow behind the plaster, fit a Duopower anyway: it will fold and lock in a cavity rather than pull straight through, saving you the embarrassment of a fixing that fails on first load.
Fischer Duopower wall plugs are used by builders, electricians, plumbers, joiners and general fixers wherever a reliable wall fixing is needed without knowing the exact substrate in advance. Common applications include hanging radiators, fixing cabinet units, securing electrical backboxes, attaching batten supports, and anchoring shelving brackets. The plug is equally at home in a new-build concrete frame or a Victorian solid brick wall, and performs well in the mixed substrates found in older properties where masonry quality is inconsistent.
The Duopower is particularly useful on refurbishment and fit-out work where walls switch between solid masonry, hollow block, and plasterboard partitions across the same room. Carrying one plug type that handles all three reduces material overhead and speeds up the job without compromising fixing integrity.
Best For
General fixing into unknown or mixed substrates
Solid concrete and brick
Perforated and hollow block
Plasterboard and dry-lining
Cavity walls
Repetitive trade fixing work
Available Sizes
5 x 25mm (120 per box)
6 x 30mm (100 per box)
6 x 50mm (100 per box)
8 x 40mm (100 per box)
8 x 65mm (50 per box)
10 x 50mm (50 per box)
10 x 80mm (25 per box)
12 x 60mm (25 per box)
14 x 70mm (20 per box)
Key Features
Two-component nylon construction
Expands, folds or knots depending on substrate
Narrow plug rim prevents slipping into hole
Serrated profile resists plug rotation
Short plug length reduces drilling time
Tactile feedback confirms correct seating
Supports push-through and positioned installation
Not suitable for: Not intended for structural or safety-critical fixings beyond the rated load for each size. Always check the Fischer load rating data for the specific substrate and size before specifying on structural applications.
Select the appropriate Duopower size based on the screw diameter and the depth required for the fixing load. Drill a clean hole to the correct diameter and depth, then push the plug in by hand or tap flush with a mallet. The narrow rim should sit flush with or just proud of the surface. Drive the screw in steadily until the plug confirms correct seating through resistance feedback. In hollow materials, the plug will fold and lock automatically as the screw is tightened.
For push-through installation on softer boards, hold the plug against the material, position the screw through the fixing bracket, and drive directly through in a single operation. This works well on plasterboard and thin partition walls where pre-drilling a separate plug hole is unnecessary.
Select the correct Duopower size to match your screw diameter and the required fixing depth.
Drill a hole to the specified diameter and depth using a masonry or multi-purpose drill bit.
Clear dust and debris from the hole before inserting the plug.
Push the Duopower plug into the hole by hand until the rim sits flush with the wall surface.
If the plug will not seat by hand, tap gently with a hammer to bring the rim flush.
Drive the screw steadily into the plug, maintaining alignment to prevent the plug from canting.
Feel for the feedback resistance that confirms the plug has expanded, folded or knotted correctly in the substrate.
In hollow materials, continue driving the screw until the plug locks firmly behind the wall face before fully tightening.
Can I use the same Fischer Duopower plug in both solid brick and plasterboard?
Yes. The Duopower is designed to work in both. In solid brick it expands radially against the drill hole walls. In plasterboard or hollow block it folds or knots behind the board face, creating a mechanical lock. The plug adapts its behaviour based on what it encounters as the screw is driven in.
How do I know which size Duopower to use?
Match the plug diameter to the screw size you are using. As a general guide, a 6mm plug suits M4 to M5 screws, an 8mm plug suits M5 to M6, a 10mm plug suits M6 to M8, and the larger 12mm and 14mm sizes suit heavier M8 to M10 fixings. Fischer provides full load data for each size and substrate combination if you need to verify for a specific application.
What does the feedback on the Fischer Duopower feel like and when does it happen?
As the screw is driven in and the plug reaches full expansion or lock-up, there is a noticeable increase in resistance. In solid materials this happens as the plug reaches full radial expansion. In hollow materials it occurs when the plug has folded and pulled tight against the back face of the board or block. It is a distinct change in feel rather than a click, but it is reliable enough to confirm correct installation without visual inspection.
Fischer Duopower wall plugs are manufactured from a two-component nylon material, with a rigid outer zone and a flexible inner core. This combination allows the plug to switch between expansion, folding and knotting modes depending on the resistance profile of the substrate encountered during screw installation. The material is suitable for dry interior and sheltered exterior environments. Fischer produces the Duopower to its own quality standards as part of the Universal fixing range, and the plug geometry is engineered to exact tolerances for consistent performance across the full size range.
Brand
Fischer
Product Range
Duopower Universal Wall Plug
Material
Two-component nylon
Colour
Grey and red
Available Sizes
5 x 25mm, 6 x 30mm, 6 x 50mm, 8 x 40mm, 8 x 65mm, 10 x 50mm, 10 x 80mm, 12 x 60mm, 14 x 70mm
From £6.89£8.27 EX VATINC VAT Select options This product has multiple variants. The options may be chosen on the product page
From £5.86£7.03 EX VATINC VAT Select options This product has multiple variants. The options may be chosen on the product page
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