Large Radius Gauge Set for Wood Moulding Hand Planes and metal industry Made of .049 thick stainless Set is from 1/4" to 2 1/8" radius by 1/8th of inch increments There are two sizes on each leaf,convex and concave, there are 8 leafs Made in USA Gauges are laser cut, with sizes cut into each leaf Tolerance-Unspecified-visual aid.