How long is the overall length of the mandrel?

Thank you for contacting Dremel, The overall length of the 402 mandrel is 11/8" Almost 1-1/2" Adrian Customer Experience Support 800-437-3635

what is the diameter of the screw, IOW what size hole does the disc need ?

Hole diameter = .076 Screw head dia. = .176

Do these have/are they supposed to have 2 little red washers? Although my Dremel mandrel doesn't have any, looks like most others I've seen have them?

I have seen them both ways. Mine does not have the washers. Works fine

Will this fit the B&D RTX-B or is it only for Dremel tools?

I have a blue hawk rotary tool & it fits it fine. So if your buying something that fits a Dremel, it will fit another rotary like the Dremel

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Description

🔧 Elevate Your DIY Game with Dremel Precision!

GLOBAL TRUST - Manufactured by Dremel, a leader in power tools.
USER FRIENDLY - Includes an instruction guide for effortless setup.
COMPACT DESIGN - Lightweight at just 5.66 g, perfect for easy handling.
PRECISION ENGINEERING - Crafted from durable alloy steel for long-lasting performance.
VERSATILE COMPATIBILITY - Designed to work seamlessly with various discs and wheels.

The Dremel 402 Mandrel is a high-quality, hand-powered tool accessory designed for use with discs and wheels. Made from durable alloy steel, it features a screw-like head for secure attachment and is lightweight for easy maneuverability. Perfect for both professionals and DIY enthusiasts, this mandrel is a must-have for precision tasks.

Specifications

Manufacturer	Dremel
Part number	402
Item Weight	5.66 g
Product Dimensions	10.16 x 5.08 x 0.51 cm; 5.67 g
Item model number	402
Size	Pack of 1
Color	DimGray
Material	Alloy Steel
Power source type	Hand Powered
Item Package Quantity	1
Measurement System	Metric
Included components	Unit^Instruction Guide
Batteries Included?	No
Batteries Required?	No

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