Product Name: Anti Backspin Tool for Pcp Surface Treatment: Black Oxide Connection: Female Material: Stainless Steel Standard: ANSI Down Hole: Equipment Trademark: Kelian Transport Package: Wood Case Origin: China HS Code: 7316000000 Product Description Working principle:When PCP is in operation, cam connector oftubing anchor rotates with stator, with the help of dip angle of cam connector three slipinserts can be openedtogether anchoring on casing firmly. When disanchoring, three slip inserts can be retracted together by turning it left several times.Wiper block is used for alignment, when slips are opened it helps three clips are frozen on the inner side of casing with even force but not for sompoint or section.