5/16" 16-14 Gauge Insulated Rings - Vinyl. 25 per bag.* Non-skid ridge - tool slides to end for proper crimp.* Beveled leading edge for easy wire entry.* Funnel Barrel Construction for positive and easy wire insertion.* Crimp ridge for centering and locating tool on terminal barrel.* Injection molded, 105 degree C rated insulation of electrical grade vinyl plastic for uniform wall thickness and interface.* Multiple "V" grooves in number 22 AWG to number 4 AWG for maximum holding power and current flow.* Barrel-to-pad transition designed to maximize strength and minimize bending.* One piece, burr-free construction for maximum electrical conductivity. Electro-tin plating for maximum corrosion resistance.