Dremel 678 circle cutter attachment for precise circle cutting.
Dremel 678 straight edge guide enables straight-line routing.
Dremel 678 circle cutter covers 3/4 to 12 inch diameters.
Dremel 678 depth adjustment for controlled cutting depth.
Dremel 678 compatibility with common Dremel tools.
Dremel 678 quick-attach design for tool-free setup.
Dremel 678 kit contents include guide and circle cutter.
Dremel 678 in-use circle cutting on metal, wood, or plastic.

Dremel

Dremel 678 Circle Cutter & Straight Edge Guide — Fits 4300, 4000, 3000, 8220

High-performance tools and home improvement made for confident daily results

$21.81

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Why customers choose TaskHolt Tools

Unlock precise circle cutting and straight-line routing with the Dremel 678

The Dremel 678 Circle Cutter and Straight Edge Guide transforms your go-to rotary tool into a dedicated circle-cutting and straight-cutting setup. It lets you create perfect circles from ¾ inch to 12 inches in diameter and guides you along straight lines for clean, repeatable results. Built to pair with a wide range of Dremel tools, this attachment is designed for quick setup and reliable performance across projects small to large.

Key capabilities

  • Circle range: 3/4" to 12" diameter for versatile projects
  • Precision stamped steel construction for accuracy and durability
  • Compatible with most Dremel corded and cordless models, with collet options
  • Attaches quickly and easily, often without tools
  • Depth adjustment to set the cutting depth precisely
  • Straight Edge Guide allows routing or cutting in a straight line

What you get and compatibility

The kit includes a Straight Edge Guide, a Circle Cutter Attachment, and straightforward Instructions. It’s designed to work with Dremel tools such as 4300, 4000, 3000, and 8220, and it can fit onto some models with the appropriate collet and nut. A 1-year limited warranty provides added assurance as you explore different materials and sizes.

  • Kit contents: Straight Edge Guide, Circle Cutter Attachment, Instructions
  • 1-year limited warranty for added peace of mind

Practical use scenarios

Imagine drilling precise circular openings for vents, speaker housings, or decorative elements in wood, plastic, or light metal. The Circle Cutter’s diameter range supports small crafts as well as larger design features, while the Straight Edge Guide helps you maintain a straight course for parallel cuts or routed channels. Depth control reduces the guesswork, enabling consistent results across repeated cuts on similar materials.

Tips for best results

  • Secure your workpiece and mark the circle before cutting
  • Choose the appropriate blade and material settings for your project
  • Confirm depth before beginning and test on scrap material

FAQ

Q: What materials can I cut with the Dremel 678 Circle Cutter and Straight Edge Guide?

A: The attachment supports circle cutting and straight routing with materials like wood, plastic, and light metal when used with compatible Dremel tools.

Q: Which Dremel models is the 678 compatible with?

A: It fits most Dremel corded and cordless tools, including 4300, 4000, 3000, and 8220 series (check collet compatibility).

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