37mm 10pcs Electroplated Diamond Core Drill Bits for Glass, Ceramic, Porcelain, Tile & Stone

Dear Valued Customers,
To comply with recent updates to U.S. import regulations, we hereby notify you of critical changes to our shipping and tariff policies for orders placed on or after April 25, 2025:
Key Policy Updates
Duty & Tax Responsibility:
All U.S. customers are solely responsible for paying applicable customs duties, taxes, and clearance fees upon delivery.
Our company will no longer cover or pre-pay these charges.
Order Confirmation Requirement:
By placing an order, you acknowledge and accept full responsibility for tariff payments.
Do NOT proceed with your order if you disagree with this policy.
Order Cancellation:
Orders lacking prior acceptance of this policy will be canceled immediately without refund.
Cancellation fees may apply for orders processed after refusal to comply.

Diamond Core Drills are made by diamond coating one end of a metal base. Use these diamond core drill bits to make holes in a variety of hard to cut materials. Unlike conventional twist drills, diamond drills work by gently grinding (or sanding) the material you are cutting. This process takes time, you have to be patient. A core drill will cut more quickly than a solid drill since it is only cutting out a small circle of material. The larger size core drill bits will also give you a useable core, but the core from the smaller drill bits are usually destroyed during the cutting process. These tools work on all types of stone,glass,tile,composites,plastics,resins,porcelain,eggs,and much more. The smaller sizes can be used in a hand drill or rotary tool (like a Dremel or Foredom), but the larger sizes should be used in a drill press.