●SIZE: Includes 5 double-slot and 2 single-slot bits with 1/8",5/32",3/16",1/4",5/16",3/8",15/32" cut diameters. ●HIGH EFFICIENCY: Seven different sizes of single and double slot bits provide straight, clean grooves on wood for improved productivity. ●WIDELY APPLICATION: Suitable for wooden door frames, wooden window frames, cabinets, boxes, solid wood, MDF, particleboard, plywood, etc. ●DURABLE QUALITY: The Straight Cut Router Bit is made of hard alloy, durable and can meet your long-term use needs. ●AFTER-SALES SERVICE: When you receive an improperly sized or damaged 1/4 straight router bit set, please contact us promptly and we will refund or resend it to you.