1.High toughness clamp claws:High toughness tightening, strengthen waterproof performance to accelerate the range of wire dozen, with the tight head assembly time-saving convenience. 2.Thick and waterproof sealing card slot:High elastic sealing card groove design, fixed tension strong sealing is good, to ensure the use of cable safety and waterproof. 3.PVC flame resistant material:The surface is bright, hard and wear-resistant, and the whole lock body is clean and smooth, without pores.