I can't open this dremel Chuck. Used liquid wrench and try to open carefully. any suggestions?

I’m late to the party (1/20/21) but had the same issue. However my new 4300 Dremel chuck was stuck when it came out of the box. I never got a chance to take the chuck off. Jill O’s. advice from 2014 was helpful but I couldn’t find a small enough drill bit. I used the opposite end of the small wrench that came with the Dremel. I stuck the end of the wrench between the chuck and the plastic EZ Twist lock. I tapped the wrench with a piece of wood and did this continuing around the base. The chuck unlocked and the teeth opened.

Does this work with the Milwawkee 12v rotary tool? Amazon advertises them together

It seems to work with any kind of rotary tool. I have both a dremel and a black&decker and it seems it is a standard size that fits all.

Will this work with a Wen rotary tool, specifically the 101 piece kit here on Amazon?

Can't believe the hours I spent trying to get the shaft size information for my 2 rotary tools. (Wen and Katonah) (or is it called "a shank"? I'm new to this world of rotary tools.) Even called Wen and the guy didn't know the size. Even Dremell doesn't give the size of the Multi Chuck hole. It only gives the Dremell models it works with. Anyhow, the collet nuts are interchangeable on both my tools so I figured it was a standard size. I bought a knock off Multi chuck at Ebay and, at least the guy put the measurements of the hole in the picture. It was .7cm. Unfortunately, that is also the size of both my rotary tool shafts/shanks so, the multi chuck was too small to screw on to the rotary tools I have. But, I am glad I came across this answer since, I almost bought a Dremell Multi Chuck. It too is too small. Saved me about 10 bucks and another disappointment. Thanks.

will it fit black and decker RTX?

Yes. I bought one to use with my RTX-B rotary tool and it works much better than the collet that came with the tool.

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Dremel 4486 Keyless Chuck - Ideal for 1/32” (0.8mm) to 1/8” (3.2mm) Shank Rotary Tool Accessories

Dremel 4486 Keyless Chuck - Ideal for 1/32” (0.8mm) to 1/8” (3.2mm) Shank Rotary Tool Accessories

Product ID: 258105674

Details

Brand
Dremel
Compatible devices
Dremel rotary
Item diameter
0.03 Inches
Item weight
0.01 Ounces
Material
Plastic

🔧Fits 1/32” to 1/8” shank sizes

⏱️Keyless design for instant bit changes

⚙️3-jaw steel chuck for secure grip

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Description

🔄 Unlock your Dremel’s full potential—fast, flexible, flawless!

PRECISION GRIP - Steel 3-jaw chuck ensures a rock-solid hold on bits from 0.8mm to 3.2mm.
EFFORTLESS BIT SWAPS - Change accessories in seconds—no wrench or collet needed.
COMPACT LIGHTWEIGHT - Weighs just 23g with sleek dimensions for easy handling and storage.
LIGHT DUTY POWERHOUSE - Perfect for drill bits, sanding drums, polishing wheels, brushes, and cut-off wheels.
UNIVERSAL COMPATIBILITY - Works seamlessly with all Dremel rotary tools, including Flex-Shaft and Right Angle attachments.

The Dremel 4486 Keyless Chuck is a precision-engineered, steel 3-jaw chuck designed for quick, tool-free accessory changes on all Dremel rotary tools. Supporting shank sizes from 1/32” to 1/8” (0.8mm to 3.2mm), it’s ideal for light-duty tasks like drilling, sanding, polishing, and cutting. Compatible with Dremel’s Flex-Shaft and Right Angle attachments, this lightweight, hand-tightened chuck streamlines your workflow by eliminating the need for collets and wrenches.

Specifications

ASIN	B0000302ZV
ASIN	B0000302ZV
Best Sellers Rank	#10,797 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #7 in Power Drill Chucks
Brand Name	Dremel
Capacity	0.13 Inches
Compatible Devices	Dremel rotary tools
Country of Publication	Germany
Country of origin	Germany
Customer Reviews	4.6 4.6 out of 5 stars (13,386)
Customer reviews	4.6 4.6 out of 5 stars (13,386)
Date First Available	7 August 2012
Department	Unisex-Adult
Global Trade Identification Number	00080596011796
Handle Type	hand-tightened
Included Components	(1) Keyless Check
Is Discontinued By Manufacturer	No
Item Diameter	0.03 Inches
Item Part Number	4486
Item Type Name	Dremel 4486 Keyless 3-Jaw Chuck, Accepts 1/32” to 1/8” Shank
Item Weight	0.01 Ounces
Item model number	4486
Lock Type	Combination, Keyless, Self-Locking
Manufacturer	Dremel
Manufacturer	Dremel
Manufacturer Part Number	4486
Material Type	Plastic
Model Number	4486
Product Dimensions	8.64 x 4.57 x 0.76 cm; 0.28 g
Thread Size	1/32" do 1/8" (0.03125 do 0.125 cala)
UPC	080596011796
Unit Count	1 Count

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