Multi Purpose Steel Dapping Block 8 Inch Metal Forming Jewelry Making Tool

Half Round Grooves: 17 Grooves 4 to 21mm

V- Shape Grooves: 3 grooves 2.5 to 4.5mm

17 Round Spheres: 4 to 18mm

5 Oval Depressions: Smallest 12 x 18mm Largest 15 x 23mm

Overall dimensions: 8" x 1-1/2" Square - 204mm x 38.5mm-Square