Usage Tips:: Woodworking Model Number: Stone Splitter Type: Stone Wedges Application: Wedge Feathers Stone Model: Industrial Grade 14 Material: Metal Color: Black Diameter: .14mm ( 9/16inch ), (use 1/2inch hammer bits can be) Size: .14*125mm/0.6*4.9 inch Quantity: 7 Set (1pc wedge + 1pc ring + 2pcs feather = 1 set) Suitable for: split the hard stone, rock, , 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. 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 Splitter Only the above package content, other 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.