Perfect Dimensions: Measuring 1-37/64 x 5/32 (40x4mm), these knives are tailored for optimal compatibility with most shaper systems. Ease of Use: Designed for straightforward insertion into your shaper cutter, allowing for quick setup and minimal downtime during your projects Made of alloyed steel Long-lasting performance CMT 690.000 Profiled Knives For Shaper Cutters, 1-37/64-Inch Cutting Pair of profiled knives to be inserted into your shaper cutter. Made of alloyed steel. Long-lasting performance. Did you find this product summary feature useful Pair of profiled knives to be inserted into your shaper cutter. CMT Shaper Cutter Heads, Insert knives, and Spare Parts - Mike's Tools