Our palm can adjust the length of the cane, which is suitable for most people with walking inconvenience, arthritis, lumbar muscle strain, knee joint injury, etc., reducing the impact on knees, thighs, shoulders and back. Material: Aluminum alloy Adjustable: 10 or 5 gears high Function: retractable, non-slip, alleviating walking fatigue, etc. (D models are equipped with LED lights) Specifications: four styles Applicable crowd: not limited to children, the elderly, young people Scope of application: hospitals, family travel, mobility assistance, sports injuries, etc. Packing list: Crutches 1 Reminder: 1. The size is manually measured, there may be an error of 1-2cm, please understands via email. very happy to help. And get back to you within 24 hoursErgonomic handle: medical rubber handle, non-slip and not easy to slip off. Suitable for mountaineering, hiking, skiing, walking and other outdoor activities. Precision adjustment buckle design: spiral lock hoop fixes the height of the crutch, double fixation will not shake, smooth metal marbles, comfortable, firm and long life. High-quality crutches: using high-quality aluminum alloy material, high hardness and not easy to rust, and the rubber non-slip foot pads are stable, highlighting high quality. Adjustment method: Press the marble ball when the lock hoop is loose, and move the marble into the appropriate gear hole. When the stick is adjusted to the appropriate length, screw the lock hoop. Upgraded version D style: The handle (including battery) is equipped with LED lights, which can adjust the angle of 45 degrees. Adjusting the lighting angle can guide you to walk safely in the dark.