Hanlinsky TSP type diamond core bits are similar to surface-set diamond bits in that they are set with a single layer of cutters mounted on the face of the bit in a pre-determined pattern. 

Instead of natural drill diamond however, the cutting media are synthetic polycrystalline diamond elements. These elements are composed of micron-sized particles of synthetic diamond that have been formed into various geometric shapes. Like surface-set diamond bits, the crowns consist of a tough wear resistant matrix body that as a minimum includes natural diamond gauge protection setting. 

In most cases, the gauge protection setting is augmented with seismic grade tungsten-carbide pads and/or polycrystalline diamond elements. 

Shear is the mechanism by which TSP bits cut the formation being drilled. In softer formations, these bits are capable of very high rates of penetration when compared to surface-set diamond bits due largely to their high degree of cutter exposure. 

Application: 
They are suited for soft to medium hard formations, such as clay, shale, sandstone, limestone, marble, basalt, etc

Hanlinsky makes three types of PCD Core Bits
TSP(Geo cube set) Type, Spicula Type, Cylinder Type