Graco 18C681 ProSurface Joint Knife 6 in

Graco 18C681 ProSurface Joint Knife, 6 in — What It Fits, Where It’s Used & Why Pros Choose It

The Graco 18C681 is a 6-inch joint knife from the ProSurface finishing lineup, built for precise drywall and plaster work. A stiff chrome-steel blade and over-molded non-slip handle deliver smooth, controlled passes for seams, patching, and skim-coat detail. An integrated #2 Phillips screwdriver lets you set proud screws before finishing, saving trips to the toolbox.

Where it’s used

• Interior drywall/plaster finishing: skim coating, feathering butt joints, touchups, and corner detail
• Residential remodels, new construction, and commercial interiors requiring a paint-ready surface

What it fits

This knife is part of Graco’s ProSurface system and pairs with ProSurface smoothing blades and accessories. It’s also commonly bundled alongside the 4-inch knife in the ProSurface Drywall Tool Kit to standardize your finishing workflow.

Key features

• Precision stiff chrome-steel blade for crisp edges and a glass-like finish
• Aluminum/steel construction for durability on busy jobsites
• Over-molded non-slip grip for comfort and control during long sessions
• Integrated #2 Phillips screwdriver for quick screw setting

How to confirm it’s the right part

1. Match the part number: 18C681 (6 in / ~150 mm joint knife).
2. Check your task scope: ideal for seams, patching, and detail work; use wider blades for large areas.
3. Verify ProSurface compatibility if you’re building a coordinated tool set.

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