BTI's unique training door system relies on the use of specialized breaching pins that are designed to replicate real world forces found in the field of operation. These pins come in 4 different styles to replicate a reinforced frame, wood frame, and metal frame as well as an explosive breaching pin. The pins can be used in multiple configurations in various BTI Breaching doors to replicate any breaching situation found in the field by breaking at different levels of exerted force. All BTI Breaching Pins are sold in quantities of 100.