For use with the Arbortech Power Chisel PCH350 Woodcarver's pack of 3 gouges No.9 x 20mm gouge No.8 x 7mm gouge 90 x 18mm Vee tool Manufactured using high strength carbon steel and heat treated for optimum hardness For both shallow and deep relief carving Arbortech chisels are manufactured using high strength carbon steel and heat treated for optimum hardness. Use these three small gouge chisels to further complement the chisels included with the angle grinder extension kit or pre-assembled power tool for both shallow and deep relief carving. Set consists of: 20mm No.9 gouge, 7mm No.8 gouge and 18mm 90 Vee tool.