Triangle Security Ladder / Ladder

In the past, we often ask someone to help us hold the ladder when we climb it. However, nowadays we can use this type of “security ladder” safely by ourselves. On both sides of the ladder, up and down, there is a triangular prism-structure which consists of smooth-proof rubber, and the structure can whirl around the middle axis. Whatever angle is the ladder put between the wall and the ground, it will fit the wall and the ground perfectly. Thus, the ladder, the wall and the ground come into a steady and closed triangle structure, which can avoid the movement of the ladder and bring more safety to the users.