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Six pieces, twelve sizes listed

APRW AP-6 combination drill-tap set

A combination drill-tap set whose contents bullet lists six imperial sizes and six metric ones, in a set the same sentence calls six pieces.

APRW combination drill and tap bits with their storage case

APRW AP-6 combination drill-tap set

A combination drill-tap set whose contents bullet lists six imperial sizes and six metric ones, in a set the same sentence calls six pieces.

Amazon reference
B0FWQX4YL9
EAN
0780748644802
  • Surface nitriding rather than a coating, which hardens the steel itself rather than sitting on it
  • A back taper that extends beyond the tap, stated to prevent over-drilling damaging the thread
  • The contents bullet lists six imperial sizes and six metric sizes in a "6-Piece" set

Best for: A range of small threads in soft metal and thin panel, once the contents are confirmed

≈ $15
Check price on Amazon

Specifications

Amazon reference
B0FWQX4YL9
EAN
0780748644802

A combination drill-tap does three jobs in one pass and this hub’s intro is skeptical of the premise for good reason — but the tool earns its place on thin panel and soft metal, where the alternative is drilling, changing tools, finding the right tap and the right tapping drill, and hoping the two match.

The treatment is the detail worth having. Surface nitriding diffuses nitrogen into the steel to harden a layer of it, rather than depositing a coating on top; a titanium nitride coating is harder but wears through at the cutting edge within a few threads, leaving plain HSS. This is the only listing on this shelf to state nitriding, and on a tool whose edge rubs continuously it is the better answer.

What the page cannot settle is what is in the box. The contents bullet begins “6-Piece drill and tapping set” and then lists six imperial sizes and six metric ones. Twelve sizes, six pieces, one sentence. The NEIKO set on this shelf shows how it should read: thirteen pieces, being six imperial, six metric and a quick-change adapter. Two of the sentences here also appear word for word on another set at the same price further down this shelf.

Availability

Read on the day this page was built: $15 at the American Amazon shop.

Read from Keepa on the day this page was last revised; stock and price both move without notice.

Prices quoted in this text were read on 2026-10-07. The live price is at the top of the page.

The questions welders ask

How many bits are in the box?

The listing contradicts itself in a single bullet. It opens "6-Piece drill and tapping set" and then lists "Imperial sizes include: 6-32NC, 8-32NC, 10-24NC, 10-32NC, 12-24NC, and 1/4-20NC; Metric sizes include: M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1.0, M8 x 1.25, and M10 x 1.5" — which is twelve sizes. Either the set is six imperial bits and the metric line belongs to a different product, or it is a twelve-piece set described as six. The NEIKO set on this shelf is the one that does this properly: thirteen pieces, being six imperial, six metric and an adapter.

Is nitriding better than a titanium coating?

It is a different thing. A titanium nitride coating is applied to the surface and is very hard, but on a cutting edge it wears through quickly and what is left underneath is plain HSS. Nitriding diffuses nitrogen into the steel itself, hardening a layer rather than adding one — so it does not flake and it survives being resharpened. On a tool that cuts threads, where the edge rubs constantly, the nitrided surface is the more sensible choice, and this is the only listing on this shelf to state it.

More drill bits & taps

  • DKIBBITH titanium combination drill and tap bits in six SAE sizes

    DKIBBITH DKVIP-003, SAE drill-tap, 6-pack

    Six combination bits covering the common small SAE threads, on a listing that tells you the single mistake that strips a thread.

    Amazon reference
    B08JZDWZ9P
    EAN
    0791715205667
    • Six genuinely different sizes — 6-32, 8-32, 10-24, 10-32, 12-24 and 1/4-20 UNC
    • Covers both pitches of the #10 thread, 10-24 and 10-32, which matters more than it looks
    • Titanium coating wears off the cutting edge quickly; the nitrided set at the same price hardens the steel itself

    Best for: The common small machine screw threads, in aluminum and thin steel

    ≈ $15
    Check price on Amazon
  • Drill America 1/2 inch NPT pipe tap with its matching 23/32 inch drill bit

    Drill America POU1/2NPTW/DRILL, 1/2 in NPT tap and 23/32 in drill

    The only product in this hub that answers the question the shelf is built on — which drill goes with which tap — by putting the two in the same bag.

    Amazon reference
    B01MG92FX1
    EAN
    0887861241854
    • Supplies the tap and its matching tapping drill together — the exact thing this hub’s introduction says stops threads tearing out
    • Publishes both sizes: a 1/2 in NPT tap and a 23/32 in drill
    • A carbon steel tap, which is softer than HSS and intended for chasing an existing thread rather than cutting a new one in solid steel

    Best for: Cutting or recutting a 1/2 in NPT pipe thread without guessing the tapping drill

    ≈ $18
    Check price on Amazon
  • KOOPOOL 114-piece ratcheting tap and die set laid out in its case

    KOOPOOL 114-piece ratcheting tap and die set

    The only set in this hub that supplies the tapping drills alongside the taps, with the thread tolerance classes and the heat treatment both published.

    Amazon reference
    B0GKG5LNHF
    EAN
    0671891089407
    • Supplies 34 matched HSS drill bits alongside the 68 taps and dies — the tapping drill question answered in the same case
    • Publishes the thread tolerance classes: 6H for metric internal threads and 2B for UNC
    • The highest price on this shelf by a factor of three

    Best for: A workshop that cuts and repairs threads across both systems and wants one case for all of it

    ≈ $100
    Check price on Amazon

Elsewhere in the workroom

  • GCE ProControl argon/CO₂, 0–30 l/min, 200 bar, product photograph

    GCE ProControl argon/CO₂, 0–30 l/min, 200 bar

    The only regulator here that names its flow range and the standard it is built to.

    Gases
    Argon and CO₂
    Flow range
    0–30 l/min
    Inlet pressure
    200 bar
    Standard
    DIN EN ISO 2503
    Amazon reference
    B0821FNJF8
    EAN
    4260509845700
    • A published flow range — the figure you actually set when welding
    • Built to DIN EN ISO 2503, the European standard for gas pressure regulators
    • €65, twice the cheapest regulator here

    Best for: Anyone who wants the regulator to be the part they never think about again

    Search Amazon for this model
  • GYS E6013 rutile Ø 3.2 mm, 70 rods, product photograph

    GYS E6013 rutile Ø 3.2 mm, 70 rods

    E6013 is the rod that lights easily and forgives — the one to learn on and the one most repairs want.

    Classification
    E6013, rutile coating
    Diameter
    3.2 mm (0.13 in)
    Quantity
    70 rods
    Material
    Steel
    Amazon reference
    B00C7R7OMG
    EAN
    3154020085145
    • Rutile rods strike easily and re-strike after a pause, which basic rods do not
    • A smooth, tidy bead with slag that lifts cleanly
    • Lower strength and less crack resistance than a basic (low-hydrogen) rod

    Best for: General repair welding in 4–8 mm (0.16 to 0.31 in) steel, and for anyone learning

    Check price on Amazon
  • GYS Steel TIG rods Ø 1.6 × 330 mm, product photograph

    GYS Steel TIG rods Ø 1.6 × 330 mm

    Nine euros of steel filler — the cheapest thing on the European half of this site, and the one that decides how a bead looks.

    Material
    Steel
    Diameter
    1.6 mm (0.06 in)
    Length
    330 mm (13 in)
    Amazon reference
    B00IWO3HY2
    EAN
    3154020087224
    • €9 — the cheapest consumable on the European half of this site
    • 1.6 mm (0.06 in) suits thin steel and stainless work, where most TIG beginners start
    • Steel rods rust: a damp tube is a wasted packet

    Best for: Thin steel and stainless TIG, and for practicing the feed

    Search Amazon for this model

All drill bits & taps