It adopts an integrated multi- design, which can meet your multiple functions of cutting, stripping, and crimping the crystal head at the same time. Even if you're a novice, you can operate like and make cables you want. Cable Tester & Replaceable Blade - Network Cable Tester for cables with RJ45/RJ11/RJ12 Connector (9V battery not included), textured handle grips reduce hand fatigue and prevent slipping during cutting, stripping and crimping Precision Crimp Die and Direct lateral crimp action provides more even, precise contact termination across all pins; Wire stripper, crimper, and cutter all-in-one tool for paired-conductor data cables The blades are made of high quality steel blade, sharp, durable and replaceable which maintains sharpness All-in-one design and Compact, ergonomic design for natural, single-hand operation Features: Complete network maintenance tools convenient for your work; Professional network crimper, save time and effort, greatly improve Work efficiency; Multi- function cable tester for testing telephone or network cables; Network Cable Tester RJ45 Crimp Tool Kit cable tester can test BNC, RJH, rj45, rj11, ST-248, cat5, and cat5e, and is suitable for testing network cables, telephone cables, alarm cables, and computer cables, intercom cables, and speaker cables. Color: As Shown Material: metal+plastic Package Contents: 1 set x Crimp Tool Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.