The new TrueCut 3 x18 rectangle ruler is great for a wide variety of projects and is easier to handle than larger wider rulers. The TrueCut 3 x18 rectangle ruler comes with the TrueCut Ruler Track. This raised edge combined with the guide on our rotary cutters is what makes it possible to achieve straight precise cuts every time. The track and guide prevent your cutter from slipping off the ruler’s edge. This amazing design helps you fully utilize the TrueCut 3 x18 rectangle ruler by getting your full 18 cut without veering away from the ruler. The track and guide system works best when paired with the TrueCut rotary cutters as the TrueCut rotary cutters are equipped with a guide that locks onto the raised edge of the TrueCut ruler. You can use this ruler with any rotary cutter and still love the results it will give you. All TrueCut rulers come with an amazing track and guide system but they also have easy-to-read marking and are made more durable than traditional rulers. TrueCut rulers are formed with an injection molded thermoplastic that makes the ruler more chip-resistant flexible and durable than other rulers.