No.

Std.

Item

Bit Std.

Reamer Std.

Bit OD（mm）

Bit ID（mm）

1

NQ3

3M triple tube core barrel

NQ3

NQ

75.3

45.0

2

HQ3

3M triple tube core barrel

HQ3

HQ

95.6

61.1

3

PQ3

3M triple tube core barrel

PQ3

PQ

122.0

83.0

4

SQ3

1.5M triple tube core barrel

SQ3

SQ

147.6

102.0