Core Thickness:0.039" (1 mm) Rim Thickness:0.051" (1.3 mm)
Arbor hole with Bushing:1" (25.4 mm) with bushing 5/8''(16mm) and 3/4''(20mm)
This blade will perform most of on any hardness rock.
It has held up extremely well and cuts just about any kind of rock, from the very soft Petoskey Stone fossils to hard jasper and agate. Designed for use on hard lapidary materials like jasper, petrified wood and geodes.