Three-Stage Height Adjustable with Handrail:This household step stool features three-stage height adjustments for both the stool legs and handrail. The stool leg height ranges from 9.2" - 10.2" - 11.4" / 233 mm - 260 mm - 289 mm, while the handrail height ranges from 31.8" - 32.7" - 33.9" / 810 mm - 830 mm - 860 mm. Hole positioning locks provide an easy way to adjust the height while maintaining the stool's stability. Robust Load-Bearing without Collapsing:The step stool is constructed with high-quality Q235B carbon steel and a stable structure, ensuring toughness and stability. It can bear a load of up to 330 lbs / 150 kg (tested up to 580 lbs / 263.1 kg without damage) and is certified to meet the European EN14183 standard.