Is there a guide to what size drill bit is used for each size rivet nut?

No, but it is easy to figure out. You want to drill a hole that is very close to the size of the nut. You want to have to force it in, but not so tight that you deform the nut. If it is slightly loose, it will still probably work OK as long as you get a good compression on the tool. There is a very specific feel to setting a riv nut properly and you might try setting a few in some scrap material to get the feel of it.

What is the warranty?

There was nothing included with the tool that mentioned a warranty.

What sizes of mandrels have?

https://www.amazon.com/dp/B08NDHWQRL/ref=cm_sw_r_cp_apa_glt_fabc_7D581X1TB89K876RTAR8 Additional smaller mandrels

Does this tool come with a case?

Dear customer, yes our product come with a hard plastic case.

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WETOLS Rivet Nut Tool Kit, 14'' Rivnut Tool with 7 Metric and SAE Mandrels

Product ID: 169350383

Details

Color
RED
Exterior Finish
Chrome
Fastener Type
Rivet
Material
Chrome steel
Thread Size
M6 M8 M10

🎒compact blow molded case

🔧7 versatile mandrels

🛠️heat-treated chrome steel

S$127

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Description

🔩 Elevate your fastening game with precision, power, and portability!

BUILT TO LAST - Chrome steel mandrels heat-treated at 40℃ and 45 carbon steel arms resist corrosion and deformation for rugged durability.
ORGANIZED PORTABILITY - Sturdy blow molded carry case keeps all 70 rivet nuts and tools perfectly secured and ready to go wherever you work.
UNIVERSAL MANDREL SET - 7 interchangeable mandrels covering both Metric (M6, M8, M10) and SAE sizes for ultimate versatility.
EFFORTLESS MANDREL SWAP - Hand-removable mandrels enable quick changes without extra tools, saving you time on every project.
COMPLETE RIVET NUT ASSORTMENT - Includes 70 rivet nuts tailored to each mandrel size, ensuring you’re equipped for any fastening challenge.

The WETOLS 14" Rivet Nut Tool Kit is a professional-grade fastening solution featuring 7 heat-treated chrome steel mandrels compatible with both Metric and SAE sizes. Packaged in a durable blow molded case with 70 rivet nuts, it offers quick mandrel changes by hand and robust construction designed to resist corrosion and deformation, making it the #1 choice for automotive and industrial riveting tasks.

Specifications

ASIN	B081GDRTXP
Best Sellers Rank	#1,047 in Automotive ( See Top 100 in Automotive ) #1 in Riveters
Brand	WETOLS
Customer Reviews	4.5 4.5 out of 5 stars (11,144)
Date First Available	November 14, 2019
Exterior	Chrome
Item Weight	4.94 pounds
Item model number	WE-882
Manufacturer	WETOLS
Manufacturer Part Number	WE-882
Product Dimensions	15.5 x 2.6 x 6.9 inches

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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S$127

Duties & taxes included

In stock

Sold byAmazon SINGAPOREDelivered 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 SINGAPORE.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

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

1 month ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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