Features: The smallest yet most powerful air-reciprocating hydraulic riveter ever made, the AK175A installs steel rivets of up to 1/4 inch diameter with 3,500 lbs. og pulling force. Designed for long life and manufactured to the highest standards of quality, the AK175A is a true breakthrough in air-powered riveting tools. • Compact, lightweight (28 ounces), and powerful (3,500 pounds of pulling force). • Full 5/8 inch travel permits installing most rivets in a single cycle. • Unique jaw system accomidates 1/8" through 1/4" rivet sizes by simply changing the nose assembly (no tools required). • Operates at normal shop air pressures of 90 to 120 psi. • Patented design.