Dasqua 30 Piece 1/32-1/4" x 64ths concave & convex gage set. satin finish. Made of rust and stain resistant stainless steel. For testing of raised and recessed curves. Precision cut blades. Both concave and convex shaped blades. Radius size is marked on each gauge. Locking clamp to keep blades in place. Contains 15 convex and 15 concave pieces.