1-2/3 in x 18 in SDS Max Rotary Hammer Drill Bit - Deep Masonry

In this review the focus is a heavy-duty 1-2/3 in x 18 in SDS Max rotary hammer drill bit intended for long, deep holes in dense materials. The reviewer found it best suited to contractors and serious DIYers who need a single large-diameter bit that reaches deep into concrete and masonry; the single biggest reason to buy is its 330mm (13 in) effective drilling depth combined with a robust carbide tip that tackles brick, stone and cement walls where smaller bits struggle.

Key Features

• Size and reach: The 42mm diameter and 460mm total length provide long reach for through-holes and deep anchor work without changing bits often.
• SDS Max shank: The SDS Max shank handle gives a secure, anti-slip fit in compatible rotary hammers so the bit tracks straight under heavy load.
• Drilling depth: With a 330mm effective drilling depth users can drill deep sleeves and set long anchors in a single pass.
• Material build: Alloy steel body with a + type carbide tip offers the abrasion resistance and edge retention needed for masonry and concrete.
• Application range: Designed specifically for masonry, brick, stone and concrete, it performs usefully on cement walls and similar dense substrates.
• Durability for trades: The combination of shank design and tip material is aimed at repeated professional use where bit longevity matters.

Who It's For

This drill bit is aimed at professional tradespeople, contractors and experienced DIYers who regularly drill large holes in concrete, stone or brick. Its 42mm diameter and deep reach make it useful for setting heavy anchors, sleeves and through-holes where a short bit would require multiple passes or extensions.

Those who should look elsewhere include casual users who only need occasional small holes or those without an SDS Max rotary hammer, since the shank and size are overkill for light-duty drilling and will not fit standard chucks.

Pros & Cons

Pros

• Large 42mm diameter and 330mm drilling depth let users complete deep holes in one pass.
• SDS Max shank ensures a stable, secure fit and efficient power transfer in compatible hammers.
• Carbide tip and alloy steel body provide good wear resistance for masonry work.

Cons

• Size and shank type mean it is not suitable for light-duty drills or occasional small projects.
• Customer feedback on tip strength is mixed, so extreme continuous hammering may reduce life versus premium-grade bits.

Specifications

Diameter	1-2/3 in (42mm)
Total length	460mm (18 in)
Drilling depth	330mm (13 in)
Shank type	SDS Max (shank dia 18mm / 0.7 in)
Tip material	+ type carbide tip
Body material	Alloy steel

Our Verdict

For professionals and serious DIYers who need to drill large, deep holes in concrete and masonry, this 1-2/3 in SDS Max bit delivers practical value through its long reach and carbide tip construction. It is a cost-effective choice where compatibility with an SDS Max hammer exists, though users should weigh mixed feedback on tip longevity if they expect continuous heavy-duty use.

Frequently Asked Questions

Will this bit fit my rotary hammer?
If your rotary hammer accepts SDS Max shanks it will fit; confirm the tool accepts an 18mm SDS Max shank before purchase.

How deep can I drill with this bit?
The bit provides a 330mm (13 in) effective drilling depth with a 460mm (18 in) total length.

Is it suitable for both brick and reinforced concrete?
It is designed for masonry, brick, stone and concrete; the carbide tip handles dense materials but reinforced concrete with heavy rebar can reduce tip life and may require specialist bits.