Using highly weather-resistant EPDM rubber sleeve expanded and assembled onto a spiral type removable plastic supporting core. Suitable for various handles of fishing rods, rackets, paddles, athletic equipment and hand tools. Replace the traditional way of EVA foaming and PU wrapping tape to avoid the possibility of loosening. Remove the supporting core at position that requires insulation and sealing protection, the EPDM rubber sleeve will shrink onto the handle quickly and tightly. Allows to quick accomplishing the sealing protection without the use of tools where fire sources are not allowed. NS8 has an outstanding elasticity and texture, the surface has friction to achieve the anti-slip performance. The high-performance insulation material can prevent accidental electric shock and enhance the safety of outdoor users.