Uncoated—Use uncoated end mills for general purpose milling and short production runs. They stay sharper than coated end mills when used on soft materials like aluminum, leaving a better finish.

Titanium Nitride (TiN) Coated—Titanium nitride (TiN)-coated end mills create less friction than uncoated end mills, which means they last longer when run at similar speeds. Use coated end mills for demanding, high-speed jobs in hard material as well as for longer production runs. The coating reduces friction and vibration as they’re used, making them more wear resistant than uncoated end mills.

Titanium Carbon Nitride (TiCN) Coated—Titanium carbon nitride (TiCN)-coated end mills have a hard, smooth finish that resists chipping and wear and prevents material from accumulating on the cutting edge. They’re especially good for use in aluminum. Use coated end mills for demanding, high-speed jobs in hard material as well as for longer production runs. The coating reduces friction and vibration as they’re used, making them more wear resistant than uncoated end mills.

Aluminum Titanium Nitride (AlTiN) Coated—Aluminum titanium nitride (AlTiN)-coated end mills dissipate heat better than other end mills, especially at high speeds. At high temperatures, the coating creates a layer of aluminum oxide that transfers heat to the chips, keeping the tool cool, even when used without lubrication. Use coated end mills for demanding, high-speed jobs in hard material as well as for longer production runs. The coating reduces friction and vibration as they’re used, making them more wear resistant than uncoated end mills.

Zinc-Plated Steel—Strong and durable with a zinc plating that protects from occasional exposure to moisture.

Powder-Coated Steel—Match the color of your steel strut channel.

Galvanized Steel—An economical alternative to stainless steel, these withstand wet and outdoor environments. However, they won't hold up to salt water and chemicals.

304 Stainless Steel—The choice for wet and outdoor environments, these resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

316 Stainless Steel—Superior to 304 stainless steel, these won't degrade when exposed to harsh weather, salt water, and most chemicals.

Aluminum—One-third the weight of steel for easier handling. These are an alternative to stainless steel for rust resistance but aren't as strong.

Fiberglass—Pair with fiberglass strut channel for a structure that won’t transmit electrical current. When conductivity isn’t a concern, fiberglass is also good for areas exposed to chemicals and salt water.