8pc Diamond Core Drill Kits Good quality with competitive price Including: 1),Φ107x150mm core bits 1pc2),Φ52x150mm core bits 1pc3),Φ28x150mm core bits 1pc4),10x115mm SDS Thread adaptor 1pc5),12x88mm HEX Thread adaptor 1pc6),10x240mm SDS Thread adaptor 1pc7),10x200mm A Thraed pilot drill 1pc8),6x50mm Drift Key 1pc