A. The convex set of six includes five grips (1/4" to 1") with a thin hand-sanding pad.
B. The concave set of five includes four grips (1/4" to 5/8") and a thick hand-sanding pad.
C. The angled set includes four grips (30°, 45°, 60° and 90°).
Well worth the money in saved time and aggravation.
Made in USA.