Ideal for removing foreign matter from workpiece, without removing base metal, changing dimensions, contaminating parts or overstressing.

Coarse – bt # 3 & 4:
Good for cleaning heavier contamination and peening for stress.

Medium coarse bt # 5, # 6, & # 7:
Good for engine rebuilding, mold texturing, and peening of softer metals.

Medium – bt # 8, # 9, # 10:
Good for plating, anodizing preparation, and most general applications.

Fine – bt # 12 & # 13:
Good for cleaning light contamination and wherever a fine surface finish is desired.
Trinco Glass Trin-Beads, Abrasive Media - BT7 - BT7