The 3M Cubitron II Hookit Clean Sanding Abrasive Disc 737U is a 5-inch random orbital sanding disc featuring precision-shaped triangular grain technology. Electrostatically oriented grains cut up to 30% faster than conventional premium abrasives and self-sharpen during use, lasting twice as long. The multi-hole clean sanding pattern delivers excellent dust extraction, while the Hookit hook-and-loop backing allows fast, tool-free disc changes on random orbital sanders. Ideal for paint preparation, feather-edging, stock removal, and blending on metal, automotive body panels, composites, and coatings.
What makes Cubitron II grains cut faster than standard abrasives?
Cubitron II uses electrostatically oriented triangular precision-shaped grains that fracture into sharp cutting edges as they wear, instead of dulling. This self-sharpening action cuts up to 30% faster and lasts up to twice as long as conventional industrial abrasives, requiring less sanding pressure.
What random orbital sanders are compatible with the 737U?
The 737U attaches via the Hookit hook-and-loop system and fits any 5-inch random orbital sander with a hook-and-loop pad, including most 3M, Festool, Mirka, and DeWalt 5-inch orbital and DA sanders.
Does the 737U provide good dust extraction?
Yes. The multi-hole clean sanding pattern aligns with the dust port layouts of most 5-inch random orbital sanders, enabling vacuum-assisted dust extraction to keep the disc clear and the work surface clean, boosting disc life and finish quality.
Which grit should I start with for automotive paint preparation?
For initial stock removal or heavy scratches start with 80+ or 120+, move to 180+ for feather-edging, and finish with 220+ or 320+ before primer application. Use 400+ for sanding between coats of primer.
# 3M™ Cubitron™ II Hookit™ Clean Sanding Abrasive Disc 737U, 5 in **Model:** `737U` **Brand:** 3M **Category:** Sanding Disc > The 3M Cubitron II Hookit Clean Sanding Abrasive Disc 737U is a 5-inch random orbital sanding disc featuring precision-shaped triangular grain technology. Electrostatically oriented grains cut up to 30% faster than conventional premium abrasives and self-sharpen during use, lasting twice as long. The multi-hole clean sanding pattern delivers excellent dust extraction, while the Hookit hook-and-loop backing allows fast, tool-free disc changes on random orbital sanders. Ideal for paint preparation, feather-edging, stock removal, and blending on metal, automotive body panels, composites, and coatings. ## Specifications | Attribute | Value | |---|---| | Product Type | Sanding Disc | | Diameter In | 5 | | Attachment | Hookit (hook-and-loop) | | Abrasive Type | Cubitron II (triangular precision-shaped grain) | | Available Grits | 80+, 120+, 180+, 220+, 320+, 400+ | | Backing | Film | | Dust Holes | Yes | | Barcode (UPC) | | Source: https://www.jaspecs.com/3m/sanding-disc/737u-3m-cubitron-ii-hookit-sanding-disc-5in/