Drill Bit Sharpener – Angle Grinder Attachment for Sharpening Twist Drill Bits (4 in or 5 in Grinders)

4 in (100 mm) angle grinder

$19.99

Drill Bit Sharpener – Angle Grinder Attachment for Sharpening Twist Drill Bits (4 in or 5 in Grinders)

$19.99

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Drill bit sharpener · angle grinder attachment

Razor-sharp drill bits in seconds, on the grinder you already own.

Clip this sharpening guide onto your angle grinder and every dull twist bit in your toolbox goes back to work. Rest the bit in the notch or hole for its size and the guide holds the tip at a set angle against the disc, so you grind a fresh edge in seconds instead of guessing by eye or buying new.

Choose the version for your grinder in the box above: the yellow bracket for 4 in (100 mm) grinders, or the orange ring for 5 in (125 mm) grinders.

How it works

A fixed angle, a fresh edge, every time

A twist bit cuts best when both lips are ground to the same angle. Freehand on a grinder, that angle wanders. The attachment fixes it: the bracket or ring sits over the disc, and each slot is cut so a bit of that size meets the disc edge at the right angle. Touch the bit to the disc, turn it, and repeat on the other lip.

The 4 in version is a half-moon bracket with six stepped notches for 4, 5, 6, 8, 10 and 12 mm bits. The 5 in version is a ring with a circle of holes from 2 to 13 mm. Both are plastic bodies with metal fixings, and the grinding itself is done by the disc already on your grinder, so you get a sharpening station without buying a sharpening machine.

Close-up of the yellow sharpener bracket showing the stepped notches that guide each drill bit size against the disc

Why it pays for itself

Sharper bits, smaller hardware bill

Savings

Keep the bits you own

A good set of replacement bits adds up fast. Sharpen the ones already in your case and put the money toward the next project.

Seconds

A short grind per lip

Rest the tip in its slot, give it a short grind, turn the bit half a turn and grind the other lip. A bit takes seconds.

Matched

Same angle on both lips

The slot sets the angle, so a steady hand is all it takes to bring a dull bit back to a clean, even point.

Specifications

The facts

What it is

A manual drill bit sharpening guide that attaches to your angle grinder; the grinder supplies all the power

4 in (100 mm) version

Yellow half-moon bracket; six stepped notches marked 4, 5, 6, 8, 10 and 12 mm; two hex bolts

5 in (125 mm) version

Orange ring; a circle of holes from 2 to 13 mm; two black thumbscrews; about 5.8 x 6.0 x 1.5 in (14.7 x 15.2 x 3.8 cm)

Bit types

Standard twist drill bits within the size range

Material

Plastic body with metal fixing hardware

Grinding disc

Works with the disc already fitted to your own angle grinder

In the box

One attachment in the size you choose, with its fixing screws

First use

Fit, feed, turn

Fit it

Unplug the grinder. Fasten the bracket over the disc with its two bolts, or clamp the ring around the guard with its thumbscrews, and check that it sits solid.

Feed the bit

Start the grinder, then rest the tip of the bit in the slot for its size until it just touches the disc. Light pressure is all it needs.

Turn and repeat

Give the bit a short grind, rotate it half a turn and grind the other lip the same way. Check that both lips look even and you are ready to drill.

What buyers say

Rated 4.7 stars by 15 buyers

“Even brought back my worst bits from the dead.” — Anthony J.

“This thing paid for itself in one weekend.” — Mark R.

“My old bits are cutting like new again.” — James C.

“Sharpens fast and accurately.” — Thomas E.

“No more tossing dull bits!” — Christopher W.

“Quick, clean, and efficient.” — Kevin C.

“Saved me a trip to the hardware store.” — John E.

“Compact and powerful.” — Joshua H.

Every order is backed by the Gear Elevation 90-day money-back guarantee.

Orange drill bit sharpener ring for a 5 in angle grinder, studio view showing the circle of stepped bit holes and two thumbscrews

In the box

Everything you need to start sharpening

The attachmentOne yellow bracket (4 in grinders) or one orange ring (5 in grinders), as chosen

Fixing hardwareTwo hex bolts with the bracket; two thumbscrews and a small bag of fitting parts with the ring

Your workshopPair it with your angle grinder, its grinding disc and your usual eye protection

Dull bits back to work, on the grinder you already have.

A fixed-angle sharpening guide for twist drill bits. Pick the version for your grinder size and keep the bits you would otherwise throw away.

Fits 4 in and 5 in grindersTwist bits 2 to 13 mm90-day money-back guarantee

We currently ship within the United States.

Most orders are processed within 1–3 business days. Standard shipping usually takes 7–12 business days and costs $9.99. Express shipping usually takes 5–7 business days and costs $19.99. Orders over $200 qualify for free standard shipping.

We accept returns within 30 days of delivery. Items must be unused, unwashed, and in their original condition and packaging. To start a return, please contact us first at info@kaatw.com with your order number.

If your item arrives damaged, defective, or incorrect, please contact us within 7 days of delivery with clear photos, and we will help arrange a replacement or refund.

Please do not send returns without approval. Return instructions and the correct return address will be provided by email.