SPECIFICATION. Down cut router bits 1" cutting length; 1/8" cutting diameter; 1/4" shank; 3" overall length, can be used on routers with 1/4" collect. COATING. The new coating provide up to 2.5 times life than the uncoated, make the bit sturdy durable, sharp efficient, smooth stable DOWN CUT. Spiral bits used for smoothly downcut groove and slots, Mortises, Cycles and dados leave with clean edge and top surface, better than straight bits COMPATIBILITY. This Router Bits is perfect for soft woods, hard woods, Plywood, laminate, OAK, MDF and any hardwood working. It can be used with cnc router and handheld router with 1/4" collet. DURABLE AND PRECISE. This downcut router bits are high-quality construction ensures durability and precision, allowing for consistent and accurate cuts. SPETOOL SERVICE. Good quality, cost-effective, efficient after-sales service, etc. SpeTool Router bit