36Pcs Carpenter Pencil Refills, 2.8Mm Solid Lead Compatible with Tracer/Pica, Long Head Deep Hole Marker for Woodworking, Construction (Black). Pencil Lead Degree (Hardness) Hard. 【Precise Marking】:The deep hole pencil lead can easily make precise marks in tight crevices or deep holes, and the 120mm length ensures a sufficient marking range, which greatly improves work efficiency.
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