This part of ISO 10097 specifies the nomenclature and the leading dimensions necessary for the interchangeability of the following wireline drilling equipment for drilling holes 48 mm to 96 mm in diameter, yielding cores of 27 mm to 63 mm in diameter. The equipment is illustrated in Figure 1 and comprises the following: a) core bit; b) reaming shell; c) core lifter; d) core lifter case; e) outer tube; f) inner tube; g) drill rod (smooth pipe only).