Convert raw-edged holes to smooth, neat, insulated holesInsulate and mechanically protect electrical and telecommunications cables, tubing, hose, rope, and utility linesLocking fingers snap into holes with fingertip pressureLocking fingers in fractional increments up to the maximum panel thicknessWithstand a push back force of 35 pound2.47 in inner diameter3.15 in head diameter0.75 in overall height-4 to 221 deg F temperature94V-2 flammability ratingMultiple locking steps for panel thickness up to 0.125 in