Stanley FATMAX SFMCF800B Impact Driver 18 V V20, 1/4″ Attachment, Body Only

The Stanley SFMCF800B impact driver is a compact and powerful 18V cordless tool (maximum 165 Nm), perfect for quick screwdriving and unscrewing on metal, wood, and construction materials. Bare tool version (without battery and charger) — ideal for those who already have compatible batteries.

The "V20 Impact Driver" Stanley SFMCF800B (1/4″ chuck) is an effective choice for professionals and advanced DIY enthusiasts who want a lightweight, handy, and versatile tool. With up to 165 Nm of maximum torque and up to 3,100 impacts per minute, it offers sufficient power for robust screwdriving, bolting, structural assembly, and work on tie rods, wood, and metal profiles. 

The no-load speed is up to 2,800 rpm, allowing for quick and precise tightening control. The 1/4″ "drop-in" hex chuck facilitates easy and fast bit changes even with one hand, excellent for sequential work. 

As a bare tool version, the SFMCF800B is ideal if you already own Stanley V20 system batteries, allowing you to expand your tool fleet without duplicating batteries and chargers. The compact and balanced design facilitates use in confined spaces, on scaffolding, furniture, or metal structures.

Benefits for the End User

High power (165 Nm) — sufficient for robust tightening, bolting, and demanding tasks. 

Cordless and compact — freedom of movement and small footprint for work on ladders, scaffolding or in the workshop.

1/4″ chuck with quick change — easy bit replacement, even with one hand. 

Ideal if you already have V20 batteries — save costs and space by purchasing only the bare tool.

Versatility of use — assembly, disassembly, work on metal, wood, and metal structures.

Potential professional or advanced DIY use — flexible solution for many applications.

Included Equipment

Stanley SFMCF800B bare tool (without battery and charger) 

Packaging box (cardboard) — "tool only" version ideal for integration into existing sets 

Who It's For

Professionals and workers who already have Stanley V20 system batteries and want an additional impact driver without spending on complete kits.

Craftsmen, installers, carpenters, and maintenance workers who need a compact and powerful tool for bolting, assembly, and tightening on metal or wood.

Advanced hobbyists who do assembly work, furniture, metal structures, or home maintenance work.

Workshops and workstations where a cordless, easily portable, and ready-to-use screwdriver is needed.

FAQ – Frequently Asked Questions

Are batteries included?

No — the SFMCF800B version is sold as a "bare tool," without battery or charger. 

What kind of chucks does it use?

1/4″ (6.35 mm) hex chuck for standard bits, with "drop-in" system for quick change. 

How powerful is it?

It provides up to 165 Nm of torque and up to 3,100 impacts/minute, sufficient for robust screwdriving and bolting. 

Is it suitable for heavy work on metal and structures?

Yes — thanks to its high torque and 18V motor, it can handle bolting, structural assembly, and metalwork.

Is it worth getting if I already have other V20 tools?

Yes — it is ideal as an additional tool without having to purchase extra batteries, useful for completing your tool kit with a robust and versatile impact driver.