3M 7100215729 Stikita 321U Disc Roll 6 Inch 320 Grit

Product Description

The 3M 7100215729 is a Stikita 321U abrasive disc roll designed for paint preparation and body repair applications. It combines a premium aluminum oxide mineral base with an engineered ceramic grain blend to deliver consistent cut and finish across a full range of automotive sanding tasks. The disc roll measures 6 inches in diameter and carries a 320 grit rating, making it well suited for final-stage surface prep work. An anti-loading coating helps resist clogging from dust and debris, extending usable disc life between changes. The Stikita pressure-sensitive adhesive backing allows fast disc changes without tools.

This disc roll is used in automotive refinishing and body repair shops for paint preparation, sealer sanding, and finish work on vehicle panels. Discs tear off one at a time from the roll without requiring liners, reducing material handling time in production environments. The ceramic and aluminum oxide mineral blend is formulated to maintain cutting performance through the life of the disc, making it appropriate for both high-volume production shops and detail-oriented finishing work. Licensed auto body technicians and professional painters are the primary installers of this product.

Key Features

• 6 inch diameter, 320 grit ceramic aluminum oxide abrasive for fine surface preparation
• Engineered ceramic mineral blend maintains cut rate and finish consistency
• Anti-loading coating resists dust and debris buildup, extending disc life
• Stikita pressure-sensitive adhesive backing for tool-free disc changes
• Liner-free roll format allows discs to tear off one at a time
• Upgraded resin system improves disc durability under sanding loads

Compatibility

Designed for use with 6 inch Stikita-compatible random orbital and dual-action sanders used in automotive paint preparation and body repair applications.

Installation Notes

Attach disc to a clean, dry 6 inch Stikita-compatible backing pad by pressing firmly and centering before use. Ensure the sander is powered off before attaching or removing discs. Remove any worn or loaded discs promptly to maintain surface finish quality. Follow shop safety guidelines and wear appropriate respiratory protection when dry sanding.

Technical Specifications

• Disc Diameter: 6 inches
• Grit: 320
• Abrasive Mineral: Ceramic Aluminum Oxide
• Backing Material: Paper
• Attachment Type: Stikita Pressure-Sensitive Adhesive
• Unit of Measure: Roll
• Package Weight: 5.957 pounds
• Package Length: 11 inches
• Package Width: 8.4 inches
• Package Height: 7.3 inches
• Minimum Order Quantity: 5
• UPC: 051131362104

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100215729