Ymkf Sqqr Wedge and Feather Shims Concrete Marble Granite Rock Stone Splitting Hand Tools (5/8", 10Pcs)

How to use a Central wedge + 2 wedges composition, b.using quarrying dedicated drill holes, remove residual powder of hole c.upside down the big side of 2 wedges (flat to flat),and put it into hole. d.upside down the small side of central wedge between 2 wedges , and finally using the hammer split stone