Does it lock in the off position so you can use it to initially break a screw loose and then spin it out with power? How does that work?

No it doesn't. The gear train between the motor and the screwdriver shaft is a high reduction setup. I.e. the motor turns fast and the shaft turns slowly. Trying to twist the the screwdriver bit in either direct can be done but is fairly difficult as you are trying to spin a reduction gear in the opposite direction. In other words, trying to spin the motor and the gears at high speed meets with serious resistance. It's OK for little screws, tho', up to M3/6BA.

Does this now use 4mm bits?

I received mine today, and measured the bits. They are 4mm not 1/8". I not that Tekton precision bits will fit, because I have those also and tried them. I believe all of the precision bit sets I have bought, within the past year or so, are 4mm so they are all interchangeable.

does this have an adaptor that goes with it ? How do you keep it charged

This tool uses two AA batteries. I do use Rechargeable batteries .

Is the thumb switch "trigger" variable speed? Or is it either on or off? Does it actually click on or you let go of it, will it return to off pos.

No, it is only one speed with a pretty good torque however it will not strip the screws. The switch is either on or off and must be held for forward or reverse directions. Keep in mind that this tool will fit the "abcGoodefg® 45 in 1 42 Tip Precision Magnetic Bit Screwdriver Set With Extension Bar". Hope it works for you as it has for me.

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Precision Cordless Electric Screwdriver #500 with Six Bits and Quick Change Chuck, Handles Difficult, Repetitive Screw-Fastening Jobs

Product ID: 1097465

Details

Brand
General Tools
Color
Black/Gray
Head Style
Variety
Material
Plastic Rubber
Number of Items
1

🔋2 AAA batteries power 100+ RPM torque

⚙️Quick change chuck fits all 4mm micro bits

🛠️Includes 6 precision bits for versatile use

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Description

🔧 Screw Smarter, Not Harder — Precision Power in Your Palm!

FORWARD REVERSE TOGGLE - Single slide switch for seamless direction changes, perfect for repetitive fastening jobs.
COMPACT PEN SIZE DESIGN - Ergonomic rubber grip and pen-like form factor provide ultimate control in tight spaces.
EFFORTLESS BIT SWAPPING - Quick change chuck compatible with all micro (4mm) bits lets you switch tasks in seconds.
VERSATILE BIT SET INCLUDED - Six precision bits (Phillips, Slotted, Torx) cover all your electronics and hobby needs.
POWERFUL CORDLESS PRECISION - Super-torque motor delivers 100+ RPM for fast, efficient screwdriving without cords.

The General Tools 500 Precision Cordless Electric Screwdriver is a compact, battery-powered tool designed for delicate and repetitive screw-fastening tasks. Featuring a super-torque motor delivering over 100 RPM, a quick change chuck compatible with all 4mm micro bits, and six precision driver tips, it offers professional-grade control and versatility in a pen-sized ergonomic design ideal for electronics, hobbies, and on-the-go repairs.

Specifications

ASIN	B002XZLTQO
Best Sellers Rank	#93,678 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #163 in Power Screwdrivers #13,397 in Industrial Hand Tools
Brand Name	General Tools
Color	Black/Gray
Customer Reviews	4.0 4.0 out of 5 stars (2,130)
Global Trade Identification Number	00038728021328
Head Size	4mm or under
Head Style	Variety
Included Components	bare-tool; attachments
Item Dimensions	1.13 x 5.5 x 11.25 inches
Item Type Name	General Tools 500 Precision Cordless Electric Screwdriver with Six Bits and Quick Change Chuck, Handles Difficult, Repetitive Screw-Fastening Jobs
Item Weight	1.36 g
Manufacturer	General Tools
Manufacturer Part Number	500
Manufacturer Warranty Description	Warranted for workmanship and materials
Material Type	Plastic, Rubber
Model Name	500 Precision Cordless Screwdriver
Model Number	500
Number of Items	1
Recommended Uses For Product	Computers, Home Appliance
Special Feature	Electric
UPC	038728021328 343538385677 343538088684
Unit Count	1 Count

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SAR 150

Duties & taxes included

In stock

Sold byAmazon KSADelivered 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 KSA.

Secure transaction

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