Abrasive jet machining (AJM),also known as abrasive micro-blasting, pencil blasting and micro-abrasive blasting. AJM is an abrasive blasting machining process that uses abrasives propelled by a high velocity gas to erode material from the workpiece. Common uses include cutting heat-sensitive, brittle, thin, or hard materials. Specifically it is used to cut intricate shapes or form specific edge shapes..