Dremel 545 Diamond Cut-Off Wheel with Mandrel – 7/8” Diameter for Hard Materials

Precision for Hard Materials

The Dremel 545 Diamond Cut-Off Wheel is built to handle tough substrates with confidence. Entirely coated in fine diamond particles, it delivers smooth, fine cuts while maintaining its shape through frequent use. With a 7/8 inch (22.2 mm) diameter and a thin 0.023 inch (0.6 mm) profile, this wheel blends cutting aggressiveness with careful control. The included 402 mandrel and a standard 1/8 inch shank make it straightforward to pair with most Dremel tools, so you can get started quickly.

• Completely coated with fine diamond particles for durable cutting on hard materials.
• Face holes help keep the wheel cool during use, reducing heat buildup and edge loss.

What you can cut, carve and fine-tune

Use this wheel for a range of tasks that demand precision on hard substrates. It shines when cutting, sawing, carving, sharpening, and filing across marble, concrete, brick, porcelain, ceramics, epoxy, and hardwood. The design is meant to hold its shape, delivering consistent results across repeated passes and longer projects.

• Ideal for shaping tile edges, trimming porcelain, or refining epoxy and hardwood workpieces.
• Durable construction helps maintain a clean edge during extended use and intricate cuts.

Compatibility and setup tips

Designed for versatility, this wheel fits all Dremel corded and cordless rotary tools with a 1/8" shank. A 402 mandrel is included, and the wheel follows the red color code for cutting accessories to help you quickly identify the right tool for the job.

• 1/8" shank standard; 402 mandrel included; compatible with all Dremel rotary tools.
• Working diameter: 7/8" (22.2 mm); blade thickness: 0.023" (0.6 mm); material: diamond.
• Maximum speed: 20,000 rpm; not intended for metal use.

Pro tips for best results: insert the accessory bit fully into the tool and back it out slightly before tightening to ensure solid grip. Avoid running above 20,000 rpm and use on scrap pieces to dial in your technique.

Product snapshot

• Diamond-coated wheel designed for smooth, fine cuts on hard materials.
• Includes 402 mandrel and standard 1/8" shank; compatible with most Dremel tools.
• Durable, shape-holding performance for precise, repeatable results.
• Not recommended for metal; designed for a variety of hard substrates.