Grip by hand and sharpen tools at the angle you need.

No need to stop and clean these stones as you polish—they’re filled with oil to keep debris from getting stuck in the pores. Use a holder to polish by hand or with a power tool (both sold separately). You’ll also need a water-soluble or oil-based lubricant to wash away debris and reduce friction and heat on your workpiece.

Debur in a flash—these pads and bricks quickly sand down burs on large flat surfaces and sharp edges. Also known as unitized blocks, they’re made by compressing multiple 3M Scotch-Brite pads together. This means they’re firm enough to nick off burs but cushioned enough to prevent gouges. The nylon mesh breaks down as you debur to expose fresh abrasive for a consistent finish. This material holds its shape, so you can cut these pads to fit specific workpieces. You can also form them into mounted points and bond them to tools. While quicker to use than deburring scrapers, they do not create as precise a cut.

Keep stones in different grits on hand to smooth ribs, slots, teeth, and other fine features. The stones in these assortments are thin enough to slip into hard-to-reach areas. Made of bonded ceramic, they’re harder and more wear resistant than aluminum oxide stones, but flexible enough not to crack under pressure. Pair these stones with a holder to polish by hand or with a power tool, such as an ultrasonic polisher. Some holders are sold separately. Apply a water-soluble or oil-based lubricant to help keep debris from building up on the surface.

Smooth ribs, slots, teeth, and other fine features—these stones are thin enough to slip into hard-to-reach areas. Made of bonded ceramic, they’re harder and more wear resistant than aluminum oxide stones, but flexible enough not to crack under pressure. Pair with a holder (sold separately) to polish by hand or with a power tool, such as an ultrasonic polisher. Apply a water-soluble or oil-based lubricant to help keep debris from building up on the surface.