1.5” CNC Surfacing Bit Ultra-Smooth Cut for Spoilboard & Slab Flattening, 1/4” Shank

Level your CNC spoilboard and flatten slabs with this precision-engineered 1-1/2” Ultra-Smooth Cut Surfacing Bit for CNC routers with 1/4" shank. This redesigned 4-flute CNC surfacing bit gives you cleaner cuts, faster feed rates, and longer tool life — helping you create perfect project surfaces with ease. Whether you're resurfacing your CNC spoilboard (also called a waste board or spoiler board), flattening slabs, or cleaning up warped project materials, this bit is an essential tool for any CNC owner. Why is this bit better? Unlike traditional 2- or 3-flute surfacing bits, this bit features a 4th flute to achieve an ultra-smooth finish on wood surfaces. Combined with a reduced forward cutting angle and a shallower grind angle on both the face and bottom, this surfacing bit exceeds the performance of all other bits in its class, giving you: Higher feed rates without sacrificing cut quality Longer tool life thanks to reduced cutting friction Superior surface finish — ideal for bot