Dremel 3-Piece Sharpening Kit A679-02

The Dremel A679-02 transforms any compatible rotary tool into a precision sharpener for chainsaws, lawn mowers, and garden tools. At 4.5 stars across 102 Dremel.com reviews and 4.6 stars from 88 Ace Hardware customers, it delivers what Montana contractors need for maintaining cutting tools between jobs.

Skip it if you’re looking for a dedicated chainsaw sharpener or don’t already own a Dremel rotary tool. This kit shines for contractors who maintain multiple tool types and already have a Dremel in their truck. It’s more affordable and multi-purpose than dedicated electric chainsaw sharpeners or professional services.

Complete Sharpening System Components

The kit transforms your existing Dremel into three different sharpeners through dedicated attachment guides. Each attachment provides the correct angle for its specific application — chainsaw, lawn mower blade, or garden tool. No guesswork on grinding angles.

Component	Application	Stone Size
Chainsaw Attachment	1/4”, 3/8”, 3/8” low-profile, .325” pitch chains	5/32” (453), 3/16” (454), 7/32” (455)
Lawn Mower Attachment	Mower blade edges	Grinding stone (932)
Garden Tool Attachment	Pruning shears, hedge clippers, shovels, axes, chisels	Grinding stone (932)

The aluminum oxide stones feature extra-fine grit that cuts clean without overheating metal. The kit includes wrench, gauge, two spacers, and instruction manual — everything needed to get sharpening immediately.

Tool Compatibility and Setup

The kit’s screw-on design installs in seconds on most Dremel rotary tools. Compatible models include: 8260, 8250, 8240, 8220, 8100, 7760, 4300, 4200, 4000, 400, 3000, 300, 398, 395, 200 series, 285, 100 series, 275, 800, 770, and 7700. That covers virtually every Dremel made in the last two decades.

Installation takes three steps. Unscrew the housing cap from your Dremel rotary tool. Install the appropriate sharpening stone for your task into the collet. Screw the sharpening attachment (garden, mower, or chainsaw) directly onto the tool housing cap threads. The whole process takes under a minute.

Model 4300 and some others require use with collet and collet nut — check your tool’s manual if you’re running the 4300. Otherwise, it’s direct thread-on attachment.

Field Performance and Trade-Offs

The kit works faster than manual files but requires patience to avoid overheating the metal chain. That’s the primary skill contractors need to develop — light pressure, steady movement, let the stone do the work. Overheat a chainsaw tooth and you’ve ruined the temper.

Some mixed reviews on Amazon due to specific compatibility or heat management during sharpening — but that 3.8-star rating comes from just 3 reviews versus 102 reviews at 4.5 stars on Dremel.com. The pattern’s clear: contractors who understand rotary tool operation get excellent results. Weekend warriors who rush the job burn chains.

Global Test Supply rates it highest at 4.8 stars from 12 reviews — the professional tool supplier’s customers clearly know what they’re doing.

For Montana contractors maintaining multiple saws through fire season, the chainsaw attachment alone justifies the kit. Those three stone sizes cover every common chain pitch. Garden crews get equal value from the ability to touch up pruning shears and hedge clippers between properties. The kit combines three popular attachments into one discounted bundle — buying separately costs significantly more.

Frequently Asked Questions

What Dremel models work with this sharpening kit?

The kit works with models 8260, 8250, 8240, 8220, 8100, 7760, 4300, 4200, 4000, 400, 3000, 300, 398, 395, 200 series, 285, 100 series, 275, 800, 770, and 7700. Model 4300 and some others require use with collet and collet nut.

Can this sharpen any chainsaw chain?

The kit handles 1/4”, 3/8”, 3/8” low-profile, and .325” pitch chains with the included stones. That covers most consumer and professional saws, but specialty chains might need different stone sizes.

How long does sharpening take compared to hand filing?

It’s faster than manual files but requires patience to avoid overheating the metal chain. Expect 5-10 minutes for a full chain versus 20-30 minutes hand filing, but don’t rush — overheating ruins the cutting edge.

What maintenance tools does the kit handle besides chainsaws?

The kit sharpens lawn mower blades, pruning shears, hedge clippers, shovels, axes, and chisels using the dedicated attachments and grinding stone. Basically any metal cutting edge that needs regular maintenance.