Astro PR36 Air Riveter Includes the following nosepieces: 3/16-inch (4.8mm), 5/32-inch (4mm), 1/8-inch (3.2mm), 3/32-inch (2.4mm) Powerful durable, high speed production tool Quick release air valve permits cylinder to return quickly for high speed assembly operations: Prevents overloading for long life Performs well at any angle Pulling Pressure - 1938 pounds