Core Drill Diamond Dry Coring Bit 4" with Pilot Bit for Hard Concrete
Not satisfied? Return it within 14 days for a full product refund. Return shipping applies for change-of-mind returns. View policy
Efficient & Smooth Drilling
This diamond core drill comprises premium aluminum alloy components, and high-quality diamond grits ensure a longer coring life. Diameter: 4 in / 101.6 mm, Drilling Depth: 9.5"/241.3 mm. A pilot bit and an extra 4.5"/114.3 mm blade is included to increase your efficiency.
Engineered for Exact Fitting
With a 5/8"-11 universal thread, this core drill bit allows easy and rapid assembling to a standard fixed core or handheld drilling machine. It is compatible with most concrete core drill devices.
Humanized Structure
Our diamond dry coring bit features chip removal holes, highly regular sawteeth, and concentric axes design. The innovative construction provides high drilling performance while keeping a long lifetime.
Simple Operation
The core drill can be used to contain your multiple work needs for both dry and wet. Start drilling at the vertical position, then continue to dig deep, and you will get a perfect hole in a second.
Versatile Applications
Our concrete core drill is fabulous for drilling hard concrete, masonry, hard brick, and other hard materials. It is widely used in installing air conditioners, pipes, stair railings, highways, airports, and other conditions.
📦 Shipping & Delivery
Free Shipping on orders $500+. For orders under $500, a flat postage fee applies based on order weight (from $4.95).
Orders are dispatched within 1–3 business days of payment confirmation. You will receive a tracking email once dispatched.
Standard delivery: 3–7 business days (metro). Regional/WA/NT may take slightly longer.
🔁 Returns & Refunds
We offer 14-day returns on all items.
To be eligible, items must be returned in original, unused condition with all original packaging.
To start a return: email hello@myhappygift.com.au with your order number.
Refunds are processed within 5–10 business days of receiving the returned item.
🛡️ Warranty
All products include a 12-month manufacturer's warranty.
Covers manufacturing defects and faults under normal use conditions.
Does not cover accidental damage, misuse, or normal wear and tear.
To make a warranty claim, email hello@myhappygift.com.au with your order number and photos of the fault.
❓ FAQs
How long does delivery take?
Orders dispatch in 1–3 business days. Standard delivery 3–7 business days.
Do you ship to all Australian states?
Yes, we ship Australia wide including WA, NT, and all regional areas.
How do I track my order?
A tracking link is emailed once your order is dispatched.
How do I contact support?
Email hello@myhappygift.com.au or call (03) 9961 6069.
Mon–Sat, 9:00 AM – 10:00 PM AEST. We respond within 24 hours.
Are your products covered by warranty?
Yes, every product includes a 12-month manufacturer's warranty.
Curated for Quality
Every product hand-selected to meet our quality standards before it reaches your home
Fast Australian Dispatch
Orders dispatched within 1–3 business days from our Australian warehouses
Responsive Local Support
Australian-based team available Mon–Sat, 9am–10pm AEST. Reply within 24 hours
Backed by Warranty
Every product includes a 12-month manufacturer's warranty — shop with confidence
