Abstract: A cutting head includes a cutting head body with an integrated collet and a shield configured to direct expended abrasive particles away from the cutting head. A wear insert is secured within the cutting head body and configured with a venturi chamber in which a stream of water accelerates a metered stream of abrasive. A focusing tube is secured to the wear insert assembly by the cutting head body with the integrated collet. The integrated collet aligns a focusing orifice of the focusing tube with an orifice through which the stream of water flows. A nut secures the integrated collet to the focusing tube and seals an interior of the cutting head body. The shield is selectively positionable along a length of the focusing tube to optimize shielding.

Abstract: The systems and methods described herein attempt to increase traveler throughput, increase officer safety, and increase bystander safety at a security checkpoint. The systems and methods described herein attempt to optimize traveler processing via segregation and pre-information selective targeting in order to allow more effective enforcement activities while facilitating the flow of legitimate trade and travel. The systems and methods implement electronic document readers, gates, and biometrics in an attempt to provide the improved functionality.