3M 7100147540 Cubitron II Hookit Clean Sanding Abrasive Disc Grit - 31366 5-Inch 80+

The 3M Cubitron II Hookit Clean Sanding Abrasive Disc (31366) is a 5-inch, 80+ grit hook-and-loop sanding disc engineered for professional automotive body repair and refinishing. Built on 3M's 737U disc platform, it delivers exceptional cut speed and extended disc life across a range of critical sanding stages.

3M Precision-Shaped Grain Technology:

At the core of this disc is 3M Precision-Shaped Grain (PSG) — electrostatically oriented, triangular-shaped ceramic grains that form sharp peaks, each acting like an individual cutting tool. This geometry cuts at least 30% faster and lasts at least 30% longer than conventional ceramic abrasives. The self-fracturing grain edges continually expose a fresh, sharp cutting surface, maintaining consistent performance and reducing the need for excessive pressure.

Key Features:

• 3M Precision-Shaped Grain — triangular grains cut faster and last longer than traditional ceramic abrasives
• Self-sharpening abrasive — grain fractures to expose fresh cutting edges throughout disc life
• Clean Sanding multi-hole pattern (133 holes) — evacuates dust more effectively than 5- or 6-hole disc designs, increasing cut rate and disc longevity
• Hookit hook-and-loop attachment — attaches firmly to a compatible hook-and-loop backup pad for fast, easy disc change-outs
• Reusable design — disc can be removed and reinstalled repeatedly for the full life of the abrasive
• C-weight backing — provides flexibility and conformability for contoured surfaces
• Resin bond construction — durable bond holds grain firmly during aggressive material removal

Specifications:

• MPN: 7100147540 | Disc ID: 31366 | Product Line: 737U
• Disc Diameter: 5 in (125 mm)
• Grit: 80+
• Backing Weight: C Weight
• Attachment Type: Hook & Loop (Hookit)
• Number of Holes: 133
• Bond Type: Resin
• Country of Origin: Canada

Ideal applications include paint removal, rough body filler shaping, fine feather-edging, final prep before priming, and surface prep before blending. Requires a compatible Hookit hook-and-loop backup pad (sold separately). For industrial and occupational use only.