The bore of the shaft diameter range 15/16" to 1-7/16" with the size range of 93 to 143: 5/16" to 3/4" with the size range of 31 to 75 for the following ring series: 5100, 5101, 5102, 5555The bore of the shaft diameter range 1-1/16" to 2" for the following ring series: 5108 with the size range of 106 to 200The bore of the shaft diameter range 1-7/16" to 2" for the following ring series: 5008 with the size range of 143 to 200Durable constructionThere is such a wide variety of retaining pliers, available individually or in sets, to handle many applications. These particular pliers are convertible. They have several ring series, bore of shaft diameter and size range that they fit. 
