Super Heavy DutyUltra strong releasable zip ties with tensile strength up to 50 pounds, durable and not easy to break UV ResistantThe UV resistant removable zip ties can withstand in cold and hot weather in outdoor, so you can fencing, planting with ease Round Ending No HurtRound ending special design for no hurting the skin, not like those sharp ends in the market, this is the upgrade character from buyers' comments Reusable & Easy to RetrackReusable zip ties for money save & eco-friendly, longer clip allow your finger positioning well to press and retract easily No Slip OffThe retracble zip ties is with clear zippers, no slip off although it is easy retracted design