1/2 (12.7mm) cutting diameter; 1/4 (6.35mm) shank; Cutting depth 0.47 (11.9mm),0.79 (20mm),0.98 (25mm).Set of 3 straight double flute bits designed for 1/4 countersinks.Carbide tip has a sharp edge and high hardness,which can leave a good smooth edge .Provides you with stable rotation and fast operation,perfect on CNC routers,table mount or handheld.The top bearing 1/4 woodworking router bit with PTFE coating has strong heat resistance.It can also effectively prevent the accumulation of wood chips,resin and asphalt,thus increasing the performance and longevity of the cutter.1.Always choose a cutter with a cutting edge longer than the workpiece.For example,when milling a groove that is 1/2 inch deep,use a tool with a cutting edge length of 1 inch.2.Flying sawdust can damage the eyes.Please take appropriate safety measures during operation.The main function of 1/4 shank straight router bit is cutting,three-dimensional clearance angle,slotting.It is not only suitable for cutting all composite materials: MDF,solid wood,chipboard,plywood,etc.,but also ideal for cleaning grooves.1/4 Straight wood router bit with top bearing for MDF hardwood particle board Features: 1.Designed for 1/4 milling cutters,cut cleanly and effortlessly.2.Leaves ultra-fine rounded details perfect for a contemporary edge ridge profile on both straight and curved edges.3.Carbide tips for cleaner cutting edges and faster waste clearance in all wood and wood-based materials.4.PTFE coated to minimize heat and resin buildup.5.Ideal for cutting grooves and cleaning grooves.Features: Material: Alloy Item Type: Router bit Size 1: approx.6.35*12.1*12.7mm/0.25*0.48*0.5in,total length: 60mm/2.36inch Size 2: approx.6.35*20*12.7mm/0.25*0.79*0.5in,total length: 66 mm/2.6 inch Size 3: approx.6.35*25*12.7mm/0.25*0.98*0.5in,total length: 71mm/2.8in Main function: cutting,three-dimensional soft angle,slotting.Package included: 1 end mill 1/4 (total length 60 mm) 1 1/4 end mill (total length 66 mm) 1 1/4 end mill (total length 71 mm)