Impregnated diamond casing and casing shoe bits are made with the diamond grits. These diamond grits are inserted into a powdered metal bond into the core and matrix of the bit. 

Surface set diamond casing and casing shoe bits are made for hole opening. Surface set diamond casing and casing shoe bits are made with natural diamonds placed on bit crown.

Tungsten carbide casing and casing shoe bits has an advantage over the price, economical application, which is suitable for medium hardness rocks.