Monadnock D-Jammer Tool 1000359. The D-Jammer Tool can be used to un-jam an auto loading rifle or shotgun. It can also be used as a self defense tool to control an attacker by using it as a striking tool. The Shell DeJammer is part of the Monadnock brand that has been synonymous with quality as the leading supplier of batons restraints training aids accessories and the preferred law enforcement professionals choice worldwide for more than 50 years. Specifications for Monadnock Shell De-Jammer: Lightweight: Yes Compact: Yes Compatibility: Accepts barrel bore of 9mm and up Features of Aluminum D-Jammer tool: Constructed of 100percent aluminum Knurled and grooved the diameter is designed to fit most pistol barrels and chambers The end of the D-Jammer is threaded to using as an emergency cleaning rod or brush Will accept barrel bore of 9mm and up Features a swivel key chain retainer Package Contents: Monadnock D-Jammer Tool 6001 1000359 Monadnock 6001 D-Jammer Tool 1000359