What diamond core bits are and the main types. Quick overview of construction, uses and selection: segmented for concrete/RC, electroplated for porcelain, plus sizing, mounts and wet/dry tips.

Practical guide to choosing diamond (core) drill bits for concrete, reinforced concrete and porcelain: diameter & thread selection (M14, 1/2 BSP, 1 1/4 UNC), wet vs dry drilling, recommended RPM, centering, and common mistakes to avoid.