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Flash HD Demolition Hammer 1700W

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now only $429
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Power through tough demolition jobs with this 1700W beast from Flash.

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Product overview

Power through tough demolition jobs with this 1700W beast from Flash.

With 45 Joules of impact power and an impact rate of 1900bpm, you be able to smash through heavy duty concrete slabs and masonry blocks without breaking a sweat.

The soft grip rear handle and lock-on switch reduces fatigue, so you can keep crushing concrete until its time to down tools. The tool-less quick-change chuck makes changing chisel bits simple and there are two bits included to get you started.

The tough metal carry case comes with a maintenance kit, so you can keep your new hammer in tip top condition. With quality cast alloy construction and backed by a 1 Year Flash Warranty, you know it’s up to the task.

Add some great value grunt to your power tool collection and order yours today.

About Flash Exclusive to Trade Tested, the Flash range of power tools have been developed to excel at the jobs Kiwis need to do.

Premium parts and materials mean they will be working hard and looking good for years to come, while clever design touches and a wide range of accessories mean you’ll always have the right tool for the job.

• Powerful 1700W motor
• 30mm x 400mm hex pointed chisel, 30mm x 400mm hex flat chisel included
• Ergonomic handle with lock-on function
• Adjustable side handle
• Metal carry case with maintenance kit
• Cast alloy/ABS plastic construction with 30mm steel hex bit shank
• Auto-stop carbon brushes
• 1 Year Flash Warranty

Rated power input: 1700W
Impact rate: 1900bpm
Impact energy: 45J
Shank: 30mm hex
Cord length: 2m
Weight: 14.3kg


Can we help?

Our friendly and knowledgeable gurus are trained to answer all your questions as quickly as possible. So if there’s anything you need to know just give us a call during business hours, or send us an email any time.

0800 800 880

Questions and answers

1 vote
Does this tool smash up concrete and have other bits that go with it?
Yes it does, it comes with 30mm x 400mm hex pointed chisel, 30mm x 400mm hex flat chisel included.
By Trade Tested on April 07 2020
0 votes
Does this tool require a specific type of oil? If so, what is it?
There will be oil in the demo hammer when purchased, however a 15W-40 oil would be best when a top is required, we have the ProVIS 15W/40 which will do the trick.
By Trade Tested on April 29 2022
1 vote
I want to attach a clay spade to this item. Do you supply them. If so, what cost? If you don't, do other attachments fit your connections? Thanks. Nick
We don't stock clay spades, however this tool will accept any 30mm hex attachments.
By Trade Tested on October 28 2018
-2 votes
I'm after an electric impact tool to driver 20mm round bar or waratah type pegs into the ground for boxing up concrete house slabs. Cheers
We'd recommend one of our post drivers,
By Trade Tested on December 10 2019
0 votes
Does this tool have any tile removal attachments?
This includes a 30mm flat chisel attachment, which should do the trick.
By Trade Tested on May 27 2019

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All reviews (12)

Read reviews that mention

Great value, made job easy

Absolutely met expectations. Makes light work of any concrete or rock busting. Did have an issue with oil leaking during shipping but stayed in box, not a big drama. Works as expected - now all the neighbours know.

Punnet Otago
Okay but

I brought this to use with a clay shovel to fill a power cable ditch unfortunately it will only hammer intermittently when used more often then not no hammer. I tried it on concrete and it hammered fine so I feel there is no issue with the device. In the past I have hired machines to do that and they have worked. So disappointed as that was my main reason to buy

Giltai Auckland
Much better than hiring one!

I had to demolish some concrete stairs took about 3 days as was a fair-sized job to hire a demolition hammer it was gonna cost a fair bit so I am so glad I purchased this over hiring!

Hamish Northland
good for piledriving

good jack hammer, does the job driving steel piles.

ade whangarei
Flash HD Demolition Hammer

Excellent product. Was impressed at how quickly it broke up my reinforced conrete paths.

Rossco Geraldine
Good quality


Preet Auckland
Great Weapon!

Excellent tool, comes with empty oil can now so no spillage issues, very solid construction and packs some punch. Demolition of concrete walls.

Demo Napier

Very good tool will go strait through 100mm of concrete in about 2 minutes .

Neil Taranaki
The Flash Demo (same as Thor's) Hammer

Brilliant customer service coupled with a sturdy & hard working no fuss tool .. for the money The Flash is well worth The Cash!

Herman Mt Eden Auckland
Demolition hammer

Great demolition hammer, works good so far

Eddy Taranaki