Fangrui Product Details Material: High Quality Steel, Heat Treatment Process, High Hardness And Toughness. Shims Are Made Of High Hardness Stainless Steel, Heat Treated Process To Improve Toughness. Multiple Uses: Using This Hand Stone Splitting Tool, Suitable For Splitting Hard Stone, Rock, , Marble, Concrete, Basalt, Sandstone, Gneiss, Limestone, Shale, Conglomerate. 18mm Rock Splitter Should Be Used With Holes Of 18mm In Diameter And 50mm Deep. How To Use: Drill Holes With Dedicated Hollow Drill, Remove The Dust Residue Of The Hole; Put Stone Splitter In The Holes; Hit Splitter With A Hammer Until The Stone Cracks. Product Length: 105mm Hole Depth: 50mm Product Weight: 146g (18mm) Attention: Please Take The Necessary Protective Measures Before Using; When The Stone Is About To Split, Keep Alert. Colour: As Shown Material: Chrome Vanadium Alloy Steel Package Contents: 5 * Stone Splitter Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The