SPECIFICATION. Up cut router bits 1-1/4" cutting length; 3/8" cutting diameter; 3/8" shank; 3" overall length, can be used on routers with 3/8" collect. UP CUT. Spiral bits used for smoothly upcut groove and slots, Plunge Mortises, Cycles and dado with clean edge and bottom, 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 3/8" collet. DURABLE AND PRECISE. This Upcut router bits are high-quality construction ensures durability and precision, allowing for consistent and accurate cuts. VARITY USE. Excellent choice for dado, rabbet, mortise, pocket, profile cutting and clearing material