This type of ladder is safe and secure because it slowly retracts even when the telescopic lock is released! This is a telescopic aluminum ladder that is very convenient for storage and carrying. When not in use, you can shrink it and store it in the trunk of your car. This is a Monotaro original telescopic ladder. Currently, it is sold on the Monotaro website for 24,000 yen including tax. Many inexpensive products of this type of ladder are sold on Amazon, etc., but there is a risk of accidentally pinching your fingers when retracting them. At worst, you could get your fingers caught. In this product's case, it has a mechanism that retracts slowly, making it very safe. Products with a slow-down function usually cost more than twice as much, so this is a very cost-effective product. I purchased it, but I realized that it doesn't suit my needs, so I'm offering it for sale. It's a new, unused item that I only extended once after taking it out of the box. It's originally a product for professional use, and the box wasn't in very good condition when it arrived, but the box is torn. Total length (m) 3.8 Storage dimensions (length x width x depth) (mm) 860 x 480 x 90 Retracted length (m) 0.86 Mass (kg) 12.7 Maximum working load (kg) 150 Rung spacing (mm) 300 Front rung effective width (mm) 295-334 Material Aluminum, steel, rubber, reinforced nylon Application As a ladder. Rung tread width (mm) 39.7 Number of rungs 13