Round & HSS bur "Contact & Depth" spots

 This essay will enable you to achieve a better understanding of what these burs can offer you while you are gemstone setting.

 I drew this (rough) diagram, as an example of where the 'contact spots' are located, once you make contact with them, your gemstone setting will be made easier.

 When you locate the teeth on the 156C (Carbide) or even the "High-Speed Steel" HSS bur always look for the teeth and these will guide you into where to start your drilling.

 These contact spots are your indeed, your true friends. I watch for them continually while doing my drilling into the metal.

 Although these two burs look the same, but this is not the case.

Remember that the "156C" teeth are made very close together, but they will not cut into the metal as much as the HSS will do.

 I ask you to choose which bur to use for different situations, as shown below.

 My diagrams should be very useful  to you and further writing, or texting is not required for this essay.