Does this allow for quick rotating from landscape to portrait, or does it require tools?

Just don't tighten the nut down all the way, and check it periodically. I rotate my 23" monitor in and out of portrait/landscape mode at least once a day, and abuse the heck out of the arm itself by constantly pulling it in and out of position. I basically only pull out the arm if I need the second monitor, put it back away to clear the space and talk to someone at my desk, pull it back when I go back to work, then rotate it to landscape at night when I want to relax, playing a video game. It gets put back to portrait when I put it away entirely for the night. Once or twice a year I check and tighten anything that's gotten loose. Seriously a nice mount, keeping in mind that mine is anchored to a solid-wood pine hutch on my desk, rather than sunk into drywall. (And, yes, I realize this question is old, but maybe it'll help someone.)

I don't have a 4mm drill bit, nor does any of my friends. What size drill bit can I use instead?

4mm / 25.4 = .1574" so a #21(.159") standard drill bit would work.

Does this pull forward after a while from the weight of the monitor?

I had mounted it on the side of a kitchen cabinet over our bar and had no problem with it moving in any way. My wife positions it when she is in the kitchen while doing odds and ends and has no problem with it staying in the position she has selected. We love it.

What size of screws does this come with? My tv says itll need m4

It come with M4x6, M4x12, and M4x30. You can take a look at the user manual on the product detail page, under Product information-Technical Specification. All included hardware kits are living on it.

ASIN	B01BCUM766
Best Sellers Rank	#828,874 in Electronics ( See Top 100 in Electronics ) #2,093 in TV Wall & Ceiling Mounts
Brand	WALI
Brand Name	WALI
Colour	Black
Compatible Devices	Television
Customer Reviews	4.5 out of 5 stars 20,229 Reviews
Enclosure Material	Alloy Steel
Global Trade Identification Number	00811278020498
Item Weight Unit of Measure	2 Pounds
Manufacturer	WALI
Material	Alloy Steel
Maximum Tilt Angle	15 Degrees
Maximum-Supported Screen Size	30 Inches
Minimum-Supported Screen Size	13 Inches
Mounting Type	Wall Mount
Movement Type	Articulating , Swivel , Tilt
UPC	811278020498
Unit Count	1.0 Count

WALI TV Wall Mount Articulating LCD Monitor Full Motion 15 inch Extension Arm Tilt Swivel for Most 13 to 32 inch LED TV Flat Panel Screen with Mounting Holes up to 100x100mm (1330LM), Black

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