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Extensions for Core Drill Bits

  • Core drilling extension adapters made with industrial grade heat treated steel.

    5/8"-11 male thread fits:

    • Dry core bits
    • Wet core bits 1-1/2" diameter and below

    1-1/4"-7 male thread fits:

    • Wet core bits 1-3/4" diameter and above
    • Fast Shipping: We will dispatch all items on same or the next business day. Our cutoff time is M-F 3:30 PM Pacific time.
    • Free Return: If your item is faulty or we have sent you something different to what you ordered, return it to us in the original packaging within 30 days and we will give you a replacement or a full refund. (Shipping cost not refunded)
    • Payment Safety: All transactions are SSL-protected and guaranteed safe.
    • Your Privacy: We will never share your information with anyone.
When will my order arrive?
Expedited shipping available at checkout.
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Core Bit Threads Drill Arbor Price Quantity
info5/8"-11 Male 5/8"-11 Female - 6" Extension $34.99
info5/8"-11 Male 5/8"-11 Female - 12" Extension $42.99
info1-1/4"-7 Male 1-1/4"-7 Female - 6" Extension $42.99
info1-1/4"-7 Male 1-1/4"-7 Female - 12" Extension $49.99
info1-1/4"-7 Male 1-1/4"-7 Female - 18" Extension $89.99
info1-1/4"-7 Male 1-1/4"-7 Female - 24" Extension $119.99

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Local pick up only. Please call (626)-656-5982 to set up a local pick up.

An item over $1500 is required for financing.

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