Tools & Home Improvement > Power & Hand Tools > Power Tool Parts & Accessories > Drill Bits & Accessories > Drill Bits
LWJ-2279 LWJ-166 Combined Step Drill Bit Set
Brand: Generic / OEM
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Audited BOM: 21 Components
RMA Chain & Defect Intelligence
Root cause causal graph linking factory engineering flaws to verified consumer return reasons.
⚡ Causal Link: Defect to Consumer Return
Inadequate heat treatment (ENG-001) makes the bearing steel brittle, leading to premature breakage (RMA-001) and customer dissatisfaction (REV-001).
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