Slips used to safely set and hold drill collars. All goods of US Origin.Drill Collar Rotary SlipsContact Us to PurchaseDCS-SAvailable OD sizes: 4" - 4-7/8" OD3" - 4" ODDCS-RAvailable OD Sizes:5-1/2" - 7" 4-1/2" - 6"DCS-LAvailable OD Sizes:11" - 12-3/4"8-1/2" - 10"8" - 9-1/2"6-3/4" - 8-1/4"