25 27 32 40 51 56 63 76 112 120 127mm Diamond Drill Bit. 370 450mm Dry Diamond Core Bit. 20-132mm Water Concrete Hole Drill Bit.

.product-description {position: ;max-width: 944.0px;overflow: hidden;} .product-description span {max-width: 100.0%;word-break: break-word;} .product-description img {max-width: 100.0%;vertical-align: middle;} .product-description p {margin: 0;line-height: inherit;} .product-description pre {white-space: pre;white-space: pre-wrap;word-wrap: break-word;} .product-description .video-container-detail {justify-content: center;align-items: center;} .product-description div {} .product-description ul {list-style-type: disc;} .product-description ol {list-style-type: decimal;} .product-description ul, .product-description ol {margin-block-start: 1.0em;margin-block-end: 1.0em;margin-inline-start: 0.0px;margin-inline-end: 0.0px;padding-inline-start: 40.0px;} Please note, it's very importance.1. When use dry drilling hole, the must be brick wall. without reinforced concrete. Diameter ≤ 63mm.2. The reinforced concrete, stone materials，and bridge drilling hole. must be with water.3. The adapter can use for the diamond drill bit diameter ≤63mm.Diamond Core Bit Diameter: 20- -132mm (Please choose) Length: 370mm(Effective drilling depth 300mm), 450mm(Effective drilling depth 400mm).Connector thread: M22x2.5mmplease note, this price is 1 piece Diamond core bit.Product DescriptionDiamond core bit is used for construction install , air conditioning, electric, heating, gas pipeline drill wall, And use highway, airport runway, bridge and tunnel engineering drilling. also can drilling Stone or ceramic non-metallic materials.Product PictureOur Services1