Astro Tools 78319 19pc 3/8ft Drive Low Profile Nano Impact Socket Set

In this review the Astro Tools 78319 19-piece 3/8' drive low profile nano impact socket set is judged as a specialist solution for technicians who need reach and clearance in tight spots. The single biggest reason to buy is the ultra-short 0.88' (22.5mm) socket length that provides substantially better access than standard shallow or stubby impact sockets, making it a practical choice for shop mechanics, fleet techs and anyone using compact impact tools. The review focuses on build, fit, and real-world usefulness rather than marketing claims.

Key Features

• Low profile length: At 0.88' (22.5mm) the sockets are 35% shorter than shallow impact sockets and 15% shorter than other stubby impact sockets, allowing work in confined spaces where standard sockets will not fit.
• Complete metric range: The 19-piece set covers 6-24mm with no skips, so users have the common sizes needed for most 3/8' drive impact tasks without hunting for individual pieces.
• 17mm outside hex: Each socket has an outside 17mm hex for additional access and the ability to use a wrench on the socket body when needed.
• Forged CR-MO construction: Forged chrome-molybdenum material and superior wall thickness between body and drive increase durability under impact use.
• Optimized for compact impacts: The low profile design works well with stubby impact wrenches and flex end ratcheting wrenches, improving access on tight fasteners.

Who It's For

Technicians who routinely work in cramped engine bays, under dashboards, or on equipment with restricted clearance will get the most value from this set, especially those who use 3/8' impact tools or compact stubby impacts. The design is tailored to people who need reliable, impact-rated sockets that still allow a box or open wrench to be applied to the outside hex.

Those who mainly work on large industrial fittings, require deep reach sockets, or prefer SAE sizes should look elsewhere, since this set focuses on a compact metric range and short profile rather than deep well access or fractional sizes.

Pros & Cons

Pros

• Short 0.88' length improves access in tight spaces compared with standard shallow sockets.
• Complete 6-24mm coverage with no skips provides convenience for most metric fastener work.
• Forged CR-MO and thicker material between socket body and drive add usable durability for impact use.
• 17mm outside hex allows use of a wrench on the socket body for extra leverage or holding.

Cons

• Low profile design sacrifices depth, so it is not suitable when deep reach is required.

Specifications

Drive size	3/8' drive
Socket range	6-24mm (19 pieces, no skips)
Socket length	0.88' (22.5mm)
Material	Forged CR-MO
Outside hex	17mm on all sockets
Profile advantage	35% shorter than shallow impact sockets

Our Verdict

The Astro Tools 78319 19-piece low profile nano impact set is a practical pick for mechanics and DIYers who need metric coverage in tight spaces; its short 0.88' length, forged CR-MO construction and outside 17mm hex deliver real utility and durability. It represents good value for those who prioritize compact access over deep reach and works well with compact impacts and flex ratcheting wrenches.

Frequently Asked Questions

Are these sockets suitable for impact use?
Yes. They are forged from CR-MO and designed as impact sockets with thicker material between the body and drive for durability.

Will they fit in very tight engine bays?
The 0.88' (22.5mm) low profile length improves access significantly and is intended for tight spaces, though very deep or recessed fasteners may still require other solutions.

Do they work with stubby impact wrenches?
Customers report they pair well with stubby impact wrenches and compact tools, and the outside 17mm hex also accepts a box or open wrench when needed.