Zareba, 25 Count, 1-2 Crimping Sleeve, Can Quickly Splice Wire, In-Line Strainers Or Loops At End Posts, Use 3 Sleeves Per Splice For Wire, 2 Sleeves For End Post Loops & In-Line Strainer Attachment, Use With 14-1/2 To 15-1/2 Gauge Wire, Crimping Tool Required.