Haige provides Oiflield Cementing tools and Casing Accessories, including Float Collar, Float Shoe, various Casing Centralizers, and Stop Collars. Stop Collar, also called Stop Ring, is used to hold a casing centralizer or other casing attachments in a fixed position. Stop Collar  Specifications: Size: 4-1/2” to 20” Types: Hinged Bolted Stop Collar Hinged Spiral Nail Stop Collar Hinged Stop Collar with Set Screws Slip-on Stop Collar with Set Screws