Milwaukee M12 3.75 in. L X 3.625 in. W Aluminum Oxide 400 Grit Sanding Sheet

Meet the Milwaukee M12 400 Grit Aluminum Oxide Sanding Sheets—a purpose-built solution for fast, controlled finishes on metal, wood, and coated surfaces. Sized for compact workspaces, these 3.75 in long by 3.625 in wide sheets with a durable hook-and-loop backing deliver quick changes and consistent contact on your M12-powered tools.

The 400 grit aluminum oxide abrasive is a versatile mid-range option that strikes a balance between material removal and a smooth final pass. It’s ideal for deburring edges, feathering blend lines, and prepping surfaces before paint or topcoats. The aluminum oxide construction stands up to heat and wear, reducing glazing and extending sheet life through longer sanding sessions.

• 12 sanding sheets per carded package.
• Size: 3.75 in (L) x 3.625 in (W).
• Abrasive: Aluminum oxide for durable, consistent cutting.
• Grit: 400 for balanced material removal and a refined finish (fits within a 400–600 grit range).
• Attachment: Hook-and-loop backing for fast, secure changes during ongoing projects.
• Color: Gray, designed for easy identification on the workstation.
• Application: Part of Milwaukee’s M12 power sanding accessories, engineered to work with compatible sander pads that use standard hook-and-loop sheets.

Ideal for DIY enthusiasts and professionals who need reliable finishes in tight spots, these sheets excel when you’re prepping metal brackets, smoothing welded edges, or refining wood edges before staining or painting. They’re also a solid choice for debris-free, consistent sanding on curved surfaces where precision matters.

Why choose these sheets over other options? The combination of 400 grit sizing and durable aluminum oxide delivers predictable results—removing burrs and creating a ready-to-finish surface without excessive aggression. The hook-and-loop design minimizes slippage and speeds up sheet changes, helping you stay productive without sacrificing finish quality.

Quick tips for best results: start with light pressure to let the abrasive do the work, keep the workpiece clean to avoid clogging, and follow up with a finer grit if you’re aiming for a near-topcoat surface. When you’re finished, store the remaining sheets in the carded package for easy organization and quick access on your next project.