MOUNTAINTOP Trekking Poles/Walking Sticks/Hiking Poles - 2 Pack -DURABLE STRAP- helps support the wrist and transfers some of the force from the hand to the wrist. This allows the user to grip the poles with less force. -EXTENDABLE- 2-section extendable from 24 to 53 inches. To set the length, loosen the locking mechanism and adjust the shaft up or down to get your appropriate length. -ADJUSTABLE BOLTS- You can adjust the angle freely by the bolts on the levers. -I-TYPE GRIP- EVA sweat free grip, ergonomics design to fit your hand perfectly. -WARRANTY- Includes 90 days limited warranty for trekking pole