Quick Answer

If you are starting out — a new part-time contractor, a tile setter adding concrete work, or a serious DIYer — buy three diamond tools before anything else: (1) a 115-230 mm general-purpose turbo or segmented blade for your angle grinder or small saw; (2) a 25-50 mm wet (or dry) core bit for holes; (3) a small resin polishing pad set (50-3000 grit, 4"/100 mm) for finishing. Spend USD 150-USD 250 total. Skip the expensive walk-behind saw, the PCD tools, and the full trapezoid plate set until you know what jobs you actually win. For our earlier beginner note, see which 3 tools to start with.

Why These Three

Every beginner overbuys. You do not need a USD 2,000 walk-behind saw for jobs you have not won yet. The three entry tools cover 80% of the small jobs a new contractor or hobbyist encounters: small cuts, small holes, and small polishing. They run on machines you already own (angle grinder, drill), so the entry cost is the tools themselves, not a new machine.

1. A General-Purpose Turbo / Segmented Blade (115-230 mm)

The first tool to buy. Start with a 115 mm (4.5") or 125 mm (5") turbo blade for your angle grinder. It cuts brick, block, concrete pavers, tile backer board, and light cured concrete. Budget USD 8-USD 20 per blade.

• Turbo rim (continuous or segmented turbo): faster cut, smoother edge, good for tile, marble, and light concrete. Our turbo blade is the classic entry choice.
• Segmented rim: better for cured concrete and masonry, allows cooling slots, cheaper. Pick one if your work is mostly concrete pavers and block.
• Wet or dry? Most 115 mm blades are dry-use. Wet them manually if you are cutting cured concrete for long periods — it extends life and controls silica.

Do not start with a 350 mm walk-behind blade. You do not have a walk-behind saw yet. When you win your first big slab job, you will buy the bigger blade then.

2. A Wet Core Bit (25-50 mm)

The second tool. Every contractor eventually needs to drill a hole for a pipe, a conduit, a vent, or an anchor. Start with two sizes: 25 mm (1") for conduit and 50 mm (2") for small pipe. A wet core bit fits a standard drill rig or a heavy-angle-grinder adapter; a dry core bit is for brick and block. Budget USD 25-USD 60 per bit.

Start small. You do not need a 150 mm bit for commercial plumbing — you will not win that job in your first season. Buy the small sizes that cover the jobs you can actually bid: conduit holes in a wall, vent holes in a slab, anchor holes for a handrail.

3. A Small Resin Pad Set (4" / 100 mm, 50-3000 grit)

The third tool. If you are doing any finishing — a small polished countertop, a repair patch, a terrazzo tile, a concrete vanity — you need resin pads. Start with a 4" (100 mm) set: 50, 100, 200, 400, 800, 1500, 3000. Budget USD 40-USD 80 for the set. They mount on a standard angle grinder with a hook-and-loop backing pad.

Our small resin pad set is the size most beginners start with. Do not buy the 17" floor pads yet — those go on a floor grinder you do not own. When you win a floor job, you will buy the larger pads then.

What to Skip (For Now)

Rent the machine for jobs you win; own the small tools you use every week. This is the standard entry model for new contractors — USD 200 in tools, USD 200/day in rented equipment when a job comes.

Machine Compatibility: Check Before You Buy

• Arbor size: most 115/125 mm blades fit a 22.23 mm bore. Check your angle grinder's arbor. Buy a blade with the right bore — do not ream it.
• Max RPM: a 115 mm blade runs 12,000-13,000 RPM max. Most angle grinders are 11,000-12,000 RPM — within range. Do not put a 350 mm blade on an angle grinder; it is not rated for it.
• Thread: core bits are 5/8"-11 or M14 for angle-grinder adapters, 1-1/4"-7 for drill rigs. Match the adapter to your machine.
• Pad size: 4" resin pads fit a 4" backing pad on a standard angle grinder. Do not force a 7" pad onto a 4" driver.

See blade sizes for machines for the full match-up.

Learn the Basics Before You Buy More

Before you expand the toolbox, learn:

• How to choose a blade — segment, bond, size.
• Correct RPM — running too fast or too slow shortens life.
• How to dress a glazed blade — a 60-second rescue.
• Silica safety — water, HEPA, respirator.
• Storage — keep your small investment cutting like new.

Frequently Asked Questions

Q: Can I use a diamond blade on a regular circular saw?

A: A 115-125 mm diamond blade fits most small angle grinders and tile saws, not a standard wood circular saw (which spins 5,000 RPM max and has a different arbor). Use the blade on the right machine. A diamond blade on a wood saw is a mismatch and can fail.

Q: How long will my first blades and pads last?

A: A 115 mm turbo blade on light concrete pavers: 20-50 cuts. A 25 mm wet core bit: 20-50 holes in medium concrete. A resin pad set: 50-100 small polishing jobs. These are small tools; they wear out, and you will reorder them — that is normal.

Q: Should I buy premium brands or cheap imports to start?

A: For entry tools, a reputable import (USD 8-20 blade) works fine. You are learning the tools, not running a fleet. Once you know which jobs you win, upgrade to consistent-spec brands for the SKUs you use weekly.

Q: What if I want to do floor polishing from day one?

A: Rent the floor grinder. A 17" grinder costs USD 3,000-USD 6,000; the resin pads are USD 200-400 per set. Rent the machine for the first 3-5 floor jobs, then buy once you have a floor-polishing pipeline. Do not buy the machine speculatively.

Conclusion

Start small: one blade, one core bit, one resin pad set. Total entry cost USD 150-USD 250. Learn on small jobs, rent the big machines for the big jobs, and expand the toolbox only when you know what you actually use. This is how every successful concrete contractor starts — not with a showroom of equipment, but with the three tools on the truck that cover the first ten jobs. Browse our entry blade range and tell us what you are cutting — we will spec the first three tools for your situation.