These thin diamond cutting discs come in 3 sizes 20mm ,25 mm, 30 mm cuts plastic and most soft metals and the aggressive grit of 150 gives a nice smooth cut.

This item is a great addition to your hobby craft tool kit. With a small drill, hanging mill or electric grinder used for cutting laminate, plexi glass panels, stone, plastic, wood, jade, agate, crystal and other products cut. Ideal for cutting and grinding: Gem stones, metal, glass, carbide, wood, laminates and aluminium and other hard materials. Features – Color: Silver. – Material: Diamond. – Size: 3.5×3.5x1cm – These diamond cutting discs are ultrathin, suitable for making slots and slits. – Can be applied on gemstones, metal, glass, ceramics, porcelain, tiles, carbide, rocks, etc. – Designed for rotary tools, durable and stable; Use lubricant when applying the diamond-coated tools in case of sparks. – Great addition to your hobby craft tool kit. – Good choice for electric grinder.

A video showing you how to use the diamond cutting wheel and the benefits.

Hers is another tool that may be useful for your toolboxSharp Scalpel Blades size 23.