Features Home inspection hammer, which is used to test whether wall, tiles, ceilings and other structures are empty. Free expansion control, stainless steel body, shockproof, non-slip, durable. Sponge handle makes it portable, comfortable and shockproof. Each part is tightly connected and stable without shaking. Freely retractable, easy to carry and use, saves space. Specification:Item Type: Sound Detection Hammer Handle Material: Sponge Body Material: Stainless Steel Retractable Length: Approx. 23cm / 9.1in Expansion Length: Approx. 115cm / 45.3in Net Weight: 96.6 g / 3.4 oz(approx.) Material: Stainless Steel Ball Diameter: Approx. 19mm / 0.7in Package List:1 x Sound Detection Hammer 1 x Wrist Strap Note:Please note that the color of the handle of this product will be sent randomly, please make sure you don't mind before ordering. Package List 1 x Sound Detection Hammer 1 x Wrist Strap