Features 1、Double Side Design: This massage hammer has double sided design, with a flat surface for scraping and a convex surface for knocking and massage, built in elastic column to ensure safe operation. 2、Stretchable Handle: This handheld massage tool has a retractable handle with a range of 24‑41.5cm, which can be adjusted by pulling out the buckle and tapping any part of the body. 3、Multiple Purpose: This manual knock massager can penetrate deep into the tense fascia of the body, massage painful knots, help you effectively relieve stress and tension. 4、Applicable Areas: This massage tool is suitable for the back, neck, legs, shoulders, thighs, etc., soothing meridians, relaxing the body and mind, releasing pressure, and promoting circulation. 5、Comfortable Grip: This stretchable knock massager is comfortable to hold, easy to operate and labor saving, making it very suitable for use at home, in the office, or during travel. Specification Item Type: Manual Massager Material: ABS, TPE, POM Stretchable Range: Approx. 24-41.5cm / 9.4-16.3in Package List 1 x Manual Massager