THIS IS A MODEL# EZ-RJ45. IT IS A RJ45 AND A RJ11 CRIMPER. THE TOOL IS MADE BY SULLSTAR TECH. THERE IS A RAZOR THAT CUTS THE END OF THE WIRE OFF FOR THE RJ45 SIDE FOR A CLEAN CUT. THESE CRIMPERS WORK GREAT AND THE RAZOR BLADE STILL CUTS. THESE ARE A LOT EASIER THAN THE IDEAL VERSION THAT DOES NOT RATCHET DOWN LIKE THESE DO. THANKS AND GOOD LUCK.