26 Piece .5-13MM Radius Gage Set ~ ~ Five different gauging surfaces on each gage for both convex and concave radius. ~ Made of satin finish rust and stain resistant stainless steel. ~ Includes handy gage holders. ~ Supplied in a plastic pouch. Five different gauging surfaces on each gage for both convex and concave radius. Made of satin finish rust and stain resistant stainless steel. Includes handy gage holders. Supplied in a plastic pouch.