If you have any questions about our products, please complete the form below. We will respond to your inquiries as soon as possible. Tips: Fields marked with*are required. 3 inch and 4 inch diamond dry core drill bits for concrete 1 High effciency, long life and no breaking of segments 2 Sizes of adaptor for threaded bit:M14,M16, G1 2 ",5 8 "-11 3 Applicable for drilling of brick wall,concrete, concrete with steel *Subject: *Your Name: *E-mail: *Phone: WhatsApp: Company: Country: *Content: Submit Δ
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