4" Type 1 Extended Angle Die Grinder. 3/8"-24 spindle. Features rear exhaust and a low-profile angle head with 3 position guard for working in hard to work areas. Heavy-duty steel constructed industrial grinders for the toughest applications. Ideal for quickly removing material, deburring, chamfering in shipyards, foundry, welding, petro chemical and fabrication applications. Patented external spindle lock version also available.