9pcs Diamond Core Drill Kits Good quality with competitive price Including:1),Φ127x170mm core bits 1pc2),Φ65x170mm core bits 1pc3),Φ38x170mm core bits 1pc4),10x200mm A Thraed pilot drill 1pc5),6x50mm Drift Key 1pc6),10x240mm SDS Thread adaptor 1pc7),12x240mm HEX Thread adaptor 1pc8),10x115mm SDS Thread adaptor 1pc9),12x88mm HEX Thread adaptor 1pc10),300x20mm Segmented blade 1pc