DMPA32P Diamond Core Drill Bit Arbor 32-114mmThe CorePlus DMPA32P Diamond Core Drill Bit Arbor features a groundbreaking, patented retractable starter bit. With a specially designed tungsten carbide tip that gives long life, penetrates hard materials and eliminates slippage. Provides accurate centring and removes the need for a traditional pilot bit. No pilot hole drilling is required. Promotes easier core removal for fast, multiple hole cutting.