The RC1223 is a nylon-insulated fork terminal with flanged tongue for wire range #12 - #10 AWG. Fork terminals enable easy installation because the mounting screw does not have to be completely removed. A flanged-tongue fork with turned up tips provide fo extra holding protection. Length .97 inches, .34 inches width, maximum insulation .210 inches, bolt hole #8. The terminal is high-conductivity electrolytic copper, electro-tin plated, with color-coded insulation. Recommended tool ERG4001.