SALI Diamond Core Drill Bit 3 1/2 in - Deep 10 in Drilling

In this review the SALI Diamond Core Drill Bit 3 1/2 in is assessed for tradespeople and serious DIYers who need a deep, reliable masonry coring tool. The bottom line: it excels when cutting clean holes through cured concrete, brick and block because of its long 10 in drilling depth and laser-welded diamond segments, making it a practical choice for installing pipes or air conditioners where a single deep pass is required. The package and adapters add real versatility for different drills.

Key Features

• 10 in drilling depth: The 254 mm inside barrel lets you core much deeper than most short bits, reducing the need for multiple passes or extensions.
• 3 1/2 in diameter: A common hole size for through-wall fittings that balances a large opening with manageable cutting load.
• Turbo laser-welded segments: Laser welding on the diamond segments improves bond strength for longer life and cleaner cuts through cured concrete and masonry.
• Two adapters included: The 3/8 in hex and 5/8-11 to SDS Plus adapter let you use the bit with a wider range of hammer and SDS Plus drills without extra purchases.
• Chip removal holes and concentric design: These features help keep drilling smooth and aid dust clearance, which keeps cutting efficient across long cores.

Who It's For

This core drill is aimed at professional installers and experienced DIY users who routinely cut holes for HVAC, plumbing or venting through concrete, brick or block and need a single bit that reaches 10 in deep. It is particularly useful when working with hammer drills and SDS Plus tools thanks to the included adapters.

It is less suitable for light occasional users who only need shallow holes or who require wet coring for continuous heavy use; those users should consider shorter bits or purpose-built wet coring systems to manage dust and cooling.

Pros & Cons

Pros

• Good depth and diameter combination for many through-wall installations and retrofit work.
• Adapters included let the bit be used with 3/8 in hex and SDS Plus drills right away.
• High-quality diamond grits and laser-welded segments provide smooth cutting and extended coring life.

Cons

• Some users report occasional teeth breakage under extreme or improper use, so technique and drill speed matter.

Specifications

Package contents	3 1/2 in core drill bit, 3/8 in hex adapter, 5/8-11 to SDS Plus adapter
Diameter	3 1/2 in / 89 mm
Inside barrel depth	10 in / 254 mm
Thread type	Industry standard 5/8-11
Primary materials	Steel body with diamond grits, laser-welded segments
Best used	Dry drilling on concrete, brick, tile, masonry and cinder block

Our Verdict

The SALI 3 1/2 in diamond core bit is a solid value for pros and experienced DIYers who need a deep, reliable coring option for concrete and masonry. With useful adapters included and durable laser-welded segments it handles most heavy-duty through-wall tasks well, provided the operator controls drill speed and follows dry drilling technique to avoid undue stress on the teeth.

Frequently Asked Questions

Can I use this bit with an SDS Plus drill?
Yes, the package includes a 5/8-11 female to SDS Plus male adapter so it can be used with SDS Plus hammer drills.

Is this bit intended for wet or dry coring?
The manufacturer recommends dry operation; dry coring with proper dust control is the intended method for typical use.

What materials will it cut?
It is designed for cured concrete, red brick, tile masonry, brick, cinder block, asphalt and rock in many installation scenarios.