The Ontario RAT Model 1 is a superb design from Randall's Adventure & Training. This knife is designed for comfort and performance with an index finger groove on the handle to keep your hand from sliding and jimping on the spine of the blade for controlled cutting. The handle features textured nylon 6 scales with an open-built steel linerlock frame. The Ontario RAT Model 1 is a strong, high-quality knife at an unbelievable price!