Features: *Make it easier to split rocks, granite, marbles,concrete,etc. High-quality steel, heat treatment process, high hardness and toughness. *Shims are made of high-hardness steel, heat-treated process to enhance toughness. *Using this tools to split the stone by hand, suitable for splitting hard stone, rock, granite, marble, concrete, basalt, sandstone, gneiss, limestone, shale, conglomerate. How To Use: *Drill holes with quarrying dedicated drill, remove residual powder of hole; *Put stone splitter into the holes; *Hit the rock splitter with a hammer until the stone cracks. Specifications: Product name:Rock Stone Splitters Material: Chromium vanadium alloy steel Color: Grey Total Length: (Approx. ) 190mm / 7.48Inch Drilling diameter: (Approx. ) 23mm / 0.9Inch Drilling depth: (Approx. ) 90mm / 3.54Inch Suitable for: splitting hard stone, rock, granite, marble, concrete, basalt, sandstone, gneiss, limestone, shale, conglomerate. Quantity: 2Set Package Includes: 2 Rock Stone Splitters Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.