I have to refit an 8 mm bolt into a cavity which we have no access to. can this tool be used to insert a rivet nut into the hole. thanks, dr

Typically this should be ok, you will require a sound surface to pull the rivnut onto, to make it work, but otherwise should work.

Where can I buy m5 replacement for this? (Uk)

Hi Clare, Not too sure what exactly you are asking. The tool itself has mandrels for M5 Rivet Nuts and M5 Nuts are readily available through Amazon and others (Screwfix, Jewson,etc...).

Annoyingly mine came with zero instructions in the box. Are they online anywhere?

Don't think so, they are straight forward to use, but the smaller size ones don't need to much pressure or the mandrel could break.

Proster Rivet Nut Tool 14 Inch With 150pcs Rivet Nuts

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

🔩 Nail every job with Proster’s powerhouse rivet nut tool!

BUILT TO LAST - Heat-treated alloy steel ensures durability for professional-grade reliability.
QUICK SWAP MANDRELS - Innovative hand-change design slashes downtime and keeps you in flow.
VERSATILE PRO DIY USE - Perfect for automotive, furniture, aerospace, and metalwork applications.
ALL IN ONE PRECISION KIT - Complete with 6 mandrels and 150 rivet nuts for every project size.
ERGONOMIC POWER LEVERAGE - Dual compound hinge and TPU handles deliver smooth, effortless installs.

The Proster 14" Rivet Nut Tool Kit is a heavy-duty, ergonomic rivet nut pliers set featuring 6 interchangeable metric mandrels (M3-M10) and 150 rivet nuts. Crafted from heat-treated alloy steel with a non-slip TPU handle, it offers quick mandrel changes and exceptional leverage for smooth installation. Ideal for professionals and DIYers tackling automotive, metal, and furniture projects, it comes complete with a sturdy carrying case for organized portability.

Specifications

ASIN	B0839CKVBW
Batteries Required?	No
Batteries included?	No
Best Sellers Rank	7,402 in DIY & Tools ( See Top 100 in DIY & Tools ) 4 in Riveters
Colour	Red
Customer Reviews	4.6 4.6 out of 5 stars (2,026)
Date First Available	30 Dec. 2019
Included components	rivet nut gun; mandrels; nuts
Item Package Quantity	1
Item Weight	2.2 kg
Item model number	Heavy duty Hand Rivet Nut
Manufacturer	Proster
Material	Alloy Steel, Carbon Steel
Package Dimensions	41.29 x 19.1 x 6.7 cm; 2.2 kg
Part number	Heavy duty Hand Rivet Nut
Power source type	Hand Powered
Size	14''

Reviews

M**I

rivnut tool easy to ude

very good tool, window regulator on a skoda mk1 had 10 pop rivets holding it in and same with the speaker 4 rivets all had to be drilled out, this tool saved the day for me, m6 and m5 rivnuts job done, easy to use and very good for the price

21.06.2025

R**N

Solid tool

Seems a solid tool. Cheaper on Temu!

15.10.2025

B**A

Useful Tool

This tool was purchased to help with converting my van. It's very sturdy.

20.07.2022

J**Y

Good little rivnut tool

I must have squished hundreds of rivnuts with this tool. Once I’d figured the technique with this tool it works flawlessly every time. It’s easy to use and seems good value

20.03.2025

K**.

Decent bit of kit.

Haven't used it yet, but seems to be a decent robust bit of kit.

3.09.2025

J**N

Just the job

Only made one use of it (for 10 M5 size rivnuts) but after struggling with a manual // DIY method using a couple of wrenches and some nuts and washers, this just did the job in moments. The tool feels solid enough, is well packaged and the interchangeable parts fit well, so let's hope it lasts.

8.05.2025

S**D

rivit

good item delivered quickly <(.!.)>

25.01.2026

D**E

Hole filler

Value for money it works so well and easy to use I’ve used it a lot its great

18.06.2025

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$118.07

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Proster Rivet Nut Tool 14 inch with 150PCS Rivet Nuts and 6 Metric Mandrels | Heavy Duty Rivnut Tool Kit with M3 M4 M5 M6 M8 M10 Mandrels. Heat-Treated Alloy Steel Rivnut Gun with Storage Box

Description

Specifications

Reviews

Common Questions