will this fit my Dremel 3000 rotary drill?

YES, collet nuts are the same size for all Dremels and other brand rotary tools such as Milwaukee.

Can this be used on the Dmel 7300

I am not sure, but I think so. The product description states the ones it does not work with, and the 7300 is not on that list. It fits my Black and Decker, and the various colletts allow for me to use just about any accessory made for any rotary tool, and also twist drill bits. I hope this helps

Will these work in the 4200 with the "EZ Change" system?

I own a basic 2 speed dremel so I can't answer with 100% assurance but my guess is NO. At the very least, the collet "nut" that is supplied will not work on your unit (is in fact replaced by the EZ change system). Also, the dremel website says the EZ402 mandrel is for use with "...exclusive EZ lock accessories.".

regarding the nut's threads, do they begin at the edge, or 1/2" down inside (on the end you screw on with)??

They begin 1/2" down If you are talking about the nut with the female threads.

Dremel 4485 Quick Change Collet Nut | Desertcart Kyrgyzstan

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

⚡ Upgrade your Dremel game with precision and speed!

TRUSTED BY THOUSANDS - Rated 4.7 stars by over 6,800 users—join the community of pros who never compromise.
COMPACT LIGHTWEIGHT - At just 9 grams, it adds zero bulk while delivering maximum performance.
QUICK CHANGE EFFICIENCY - Swap collets in seconds without extra tools—maximize your workflow and minimize downtime.
DURABLE METAL CONSTRUCTION - Crafted from high-grade metal for long-lasting reliability under heavy use.
PRECISION FIT FOR EARLY MODELS - Seamlessly compatible with vintage and current Dremel drills, ensuring your trusted tool stays sharp.

The Dremel 4485 Quick Change Collet Nut is a precision-engineered metal accessory designed for 0.13-inch capacity drill bits, featuring a 1/4-20 UNC thread and hand-tightened manual lock. Lightweight at 9 grams and compatible with early and current Dremel models, it enables fast collet swaps and is highly rated by thousands of users worldwide.

Specifications

ASIN	B0000302Z6
Best Sellers Rank	49,818 in DIY & Tools ( See Top 100 in DIY & Tools ) 4,473 in Power Tool Accessories
Brand	Dremel
Capacity	0.13 inches
Compatible Devices	Drilling Machine
Compatible devices	Drilling Machine
Country of Origin	Mexico
Customer Reviews	4.7 out of 5 stars 6,889 Reviews
Global Trade Identification Number	00080596000196
Handle Type	Hand-tightened
Item Diameter	0.13 Inches
Item Part Number	4485
Item Weight	9 g
Item diameter	0.13 Inches
Item weight	9 g
Lock Type	Manual
Manufacturer	Dremel Mfg Co
Material	Metal
Model Number	4485
Number of Items	1
Part Number	4485
Thread Size	1/4-20 UNC
Thread size	1/4-20 UNC
UPC	080596000196
Unit Count	1.0 count

Reviews

A**R

Replacement dremmel collet

This fitted my Dremmel which is a very early model

2.11.2025

C**8

good

very good

14.07.2019

R**R

Five Stars

great price

1.08.2015

M**K

Alternatieve spankop

Een dergelijk alternatief voor een dremelspankop.

12.05.2026

山**司

とても精密

手に入らない物だと諦めて改良して使っていましたが､アマゾンさんで本品を手に入れる事が出来て大変助かりました。今までとは比べられないほど作業がはかどりとても嬉しいです。次回も宜しくお願いします。

30.01.2026

M**K

Good buy

Happy

18.01.2024

V**Y

At last!!

Found an original Dremel product...fits perfectly...though it took some time to deliver the product overall happy with the results.

29.05.2017

O**Z

Buen producto

21.06.2025

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Perfect platform for hard-to-find items. Delivery was prompt.

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

2 weeks ago

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Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Great price for an authentic product. Fast international shipping too!

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