Stainless steel telescopic design with reinforced pressure groove make it a firm and durable product. Sponge handle makes it portable, comfortable and shockproof. The round ball design can avoid scratches on people or the blackboard. It can be used to check whether the walls, floors, ceilings, tiles, etc. Item Name: Empty Drum Hammer Material: Stainless Steel, Sponge Features: Telescopic, Anti-drop, Stable, Shockproof Total Stretch Length: 115cm/45.28" (Approx.) Ball Head Diameter: 19mm/0.75" (Approx.) Retracted Length: 22cm/8.66" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Empty Drum Hammer