This Trend Acrylic Spiral Upcut Router Cutter comes in a 4mm cutting diameter with a 14mm cut length and 1/4" shank, offering enhanced precision for finer routing work in acrylic and plastic sheet materials. The 4mm diameter is particularly useful for intricate slots, detailed profile cuts, and tighter radii where a larger cutter simply would not fit, making it a valuable addition to any routing setup that handles detailed acrylic work. Despite its smaller diameter, the up-cut helical flute design continues to deliver excellent swarf evacuation and reduced heat build-up, protecting acrylic from the melting and chipping that can compromise edge quality. The finish achieved is consistently super-fine, maintaining Trend's high standard across the range. Features and Benefits: • Compact 4mm diameter ideal for intricate and detailed routing work • Up-cut helical flute efficiently clears chips for a cooler, cleaner cut • Super-fine finish on acrylic and plastics with minimal post-processing • 1/4" shank fits a wide range of routers and CNC spindles Specifications: Diameter Cut: 4mm Cut Length: 14mm Shank Diameter: 1/4" Dia Metric: 4 Dia Imperial: 5/32 Cut Length Metric: 14 Cut Length Imperial: 15/32 Overall Length Metric: 59 Type or Grade: Up-cut