DIY Supplies: WoodworkingModel Number: Stone SplitterType: Stone WedgesApplication: Wedge Feathers StoneModel: Industrial Grade 14Material: MetalColor: BlackDiameter: approx.14mm ( 9/16inch ), (use 1/2inch hammer bits can be)Size: approx.14*125mm/0.6*4.9 inchQuantity: 7 Set (1pc wedge + 1pc ring + 2pcs feather = 1 set)Suitable for: split the hard stone, rock, granite, concrete.High-quality steel, heat treatment process.High hardness and high toughness.Durable and practical.Easy to use.How to use:First with quarrying dedicated drill holes, remove residual powder hole.The two big head-wedge, the plane would like to put in the hole.Then put upside down in a small wedge in the middle wedge, and finally with the hammer.Package Contents:7 Set * Wedge and Feather Stone SplitterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.