1.the contact area of slips and drop fishing is large 2.once fishing is jammed ,the tool may exit safely The Specification we provide is from 89mm to 340mm OD. The threads are NC26, NC 31, NC 38, NC50, 6-5/8 REG TypeO.D.(mm)Max.Catch (mm)ThreadAPITypeO.D.(mm) Max.Catch (mm)ThreadAPIBasket GrappleSpiral GrappleBasket GrappleSpiral GrappleLT-T898960.347.6NC26LT-T194194159141NC50LT-T92927363.5NC26LT ...