Starrett
Can be used with flat straight edges, shoulders, grooves, round work, studs, dowels or center points and scribed lines. Body and contacts are made of tool steel, hardened, ground and lapped to close tolerances for diameter and concentricity.
Single End. .375" body dia., .200" contact dia.
WARNING: This product can expose you to chemicals including lead which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.