1、Telescopic design, easy to use, gently tap the wall to detect the cavity wall. 2、Mainly used for hollowing drum detection in a newly decorated house. 3、Reliable quality stainless steel rod, sturdy and with great durability. 4、Non-slip and soft sponge handle, comfortable to grasp. 5、Mini size, portable and lightweight, space-saving, easy to carry. This telescopic hollowing drum detection hammer is practical to use in a newly decorated house. It helps you get rid of the quality problem caused by cheating in workmanship and materials. And it's portable and compact, easy to carry. Features: Telescopic design, easy to use, gently tap the wall to detect the cavity wall. Mainly used for hollowing drum detection in a newly decorated house. Reliable quality stainless steel rod, sturdy and with great durability. Non-slip and soft sponge handle, comfortable to grasp. Mini size, portable and lightweight, space-saving, easy to carry. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color & Length: Red, 160cm/ Blue, 160cm/ Orange, 130cm (Optional) Material: Stainless Steel + Sponge Package Size: Approx. 1.9 * 1.9 * 26cm / 0.75 * 0.75 * 10.24in Package Weight: Approx. 130cm: 130g / 4.59oz 160cm: 150g / 5.29oz Package List: 1 * Hollowing Drum Detection Hammer 1 * Hollowing Drum Detection Hammer