Astro Tools 93812 Nano Ratchet 3/8 Inch

3/8 inch drive head on a 1/4 inch ratchet body
14.2 inches long
SAE (inch) measurement standard
Ratcheting, mechanical operation
0.61 pounds, chrome finish
0.38 inch jaw capacity

Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A slim, long hand ratchet for reaching sockets that sit deep or tight. Despite the category label it is a manual tool, not an impact wrench, so do not strike or power it.

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ASIN: B01JBJPG7WModel: 93812Category: Impact Drivers & Wrenches

Overview

Driving sockets from a slim ratchet body, this tool pairs a larger drive head with a narrow handle section so it fits where a standard ratchet cannot. The head is fixed, with square and hex drive styles, and the long body adds reach and leverage.

Reach and a slim profile are the reasons to own it, since the narrow body slips into gaps a bulky ratchet would block. The limitation is that nothing in the listing rates it for impact use, and only one drive size is named.

Who it's for

Mechanics and assembly workers who need to turn inch hardware inside tight housings get a long narrow ratchet suited to the job. Users wanting a power-driven impact wrench for stubborn bolts need a different category of tool.

Pros and cons

Pros

Slim body reaches tight areas
Long handle adds leverage
Chrome finish wipes clean
Ratcheting action speeds up turning

Cons

Not rated for impact use
Inch hardware only
Single drive size listed
No socket included

Performance notes

A narrow ratchet body limits how much torque the mechanism can carry, so it suits snug fasteners and not breaker-bar work. The long reach lets the user work around obstructions, and the ratcheting action allows continuous turning in a confined spot. Chrome plating protects against surface rust but does not change the strength of the steel.

Specifications

Dimensions & fit
Brand	Astro
Model	93812
Item Length	14.2 Incheshigher than 85% of 111 impact drivers & wrenches
Wrench Length Style	Standard
Item weight	0.61 Pounds
Capacity & performance
Jaw Capacity	0.38 Incheslower than 85% of 56 impact drivers & wrenches
Construction & materials
Material Type	Chrome
Finish Types	Polished
Other details
Head Style	Fixed Square, Hex
Operation Mode	Mechanical
Measurement Standard	SAE (Inch)
End Style	Socket End
Is Racheting	Yes
Is Non Sparking	No