12pcs 1/4'' Tungsten Carbide Tipped Shank Reamer Bit Set Tool With Wooden Box 40JEOOTDTYSechy:This Die Cutter Set Includes A Range Of The Most Commonly Used Decorative Woodworking KnivesUsage: The product is drilled with a professional electric drill, bench drill. Rpm 800-1000 or as close as possible, as well as adding water to cool the holes during operation is an advantageProvide complete comfort in a handy wooden storage container Suitable for wood, MDF, hardwood and softwoodSpecifications:Material: hard alloy Shank diameter: Approx. 1/2" (12.7mm), 1/4" (6.35mm) 6mm (1/4") straight bit 12mm (1/2") straight bit 16mm (5/8") straight bit 12.7mm (1/2") 90deg" V " grooving bit 12.7mm (1/2") dovetail bit 32mm (1-1/4") 45deg chamfering bit12.7mm(1/2")R6.3mm(1/4") round bitR9.5mm(3/8") round bitR6.3mm(1/4") core box bitR6.3mm(1/4") cove bitR4mm(5/32") roman ogee bitQuantity: 12pcs/1 setNote:1. Transition: 1cm=10mm=0.39 inch2. Please allow 1-3mm error due to manual measurement. Pls make sure you don't mind before you bid.3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Contents:12 x Reamer Bit Set1 x Wrench (Packed in Wooden Box)