Specifications Color BlackMaterial MetalDiameter 9 16 14mm Use 1 2 hammer bits can be Size 14x110mm 0 6 4 3 inchSuitable For Split the hard stone rock Granite concrete Features Easy to use High quality steel heat treatment process High hardness toughness Low cost cost versatility How to use 1 The next two big head wedge the plane would like to put in the hole2 Central wedge a wedge 2 composition first with quarrying dedicateddrill holes remove residual powder hole3 Then put upside down in a small wedge in the middle wedge and finallywith the hammerPacking Included 1 x Wedge2 x FeatherMore details