On a random orbit sander, a disc with a grit number of 200 is

• A. used for finish sanding
• B. used for rough stock removal
• C. used for shaping edges
• D. used for heavy material removal

Answer: (A)

Grit size tells you how fine or coarse the abrasive is, and higher numbers mean a finer finish. A 200‑grit disc is fine enough to remove only small imperfections and to smooth the surface, making it ideal for finish sanding. The random orbit action helps blend scratches evenly and prevents visible swirl marks, which is exactly what you want when you’re preparing wood for stain or clear finish. So this disc is used for finishing the surface and pre-finishing prep, rather than for ripping away a lot of material. Coarser grits (lower numbers) remove material quickly and shape edges, while very coarse grits are used for heavy material removal.