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API onye na-eweta olulu mmiri miri emi IDC537 9 5/8 ″(244.5mm)
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API TCI bọtịnụ bit IDC537 9 7/8 ″(250mm) maka igwu mmiri nke ọma
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Bọtịnụ Rotary Bit IDC537 3 7/8 ″ (98mm)
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Tricone Bits IDC537 4 5/8 ″ (118mm)
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Tricone drill bits IDC537 4 3/4" (120.6mm)
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API tricone rock bit IDC537 5 1/4 ″ (133mm)
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API rock drill bit IDC537 5 1/2 ”(139.7 mm) maka olulu mmiri siri ike
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API mkpọpu ihe IDC537 5 5/8 ″ (142.9mm)
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Igwe na-agba ọsọ tungsten carbide dị elu IDC537 5 7/8 ″ (149mm)
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Tricone rock ibe n'ibe IDC537 6 sentimita (152.4 mm)
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Rotary tricone bit IDC537 6 1/4 inch (159 mm)
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TCI tricone nkume ibe n'ibe IDC537 6 3/4" (171mm)