Here are some important factors to consider when choosing wire collated coil nails:

• Gauge - Lighter gauges (thinner shank) are easier to drive but may break more easily. Heavier gauges withstand more stress.

• Length - Shorter nails for light work, longer for deeper penetration through multiple layers of material.

• Material - Common options are steel, stainless steel, or aluminum. Consider corrosion resistance for exterior use.

• Coating - Zinc, polymer or other coatings protect against rust/corrosion and make driving easier compared to bare nails.

• Head style - Round, oval, nasty/framing. Choose style suitable for intended material and application.

• Collated wire type - Plastic, paper, or steel determine ease of use and economy for various nailers/guns.

• Approvals - Look for certification/approval from agencies like ICC ESR for use in structural applications.

• Quantity/packaging - Consider value and shelf life for expected usage volume to avoid waste.

• Application - Consider joining needs - sheathing, hardwood flooring require different properties than fencing.

Choosing the right nail for each job ensures structural integrity, performance and prevents call backs.