Chamfer Countersink Bit SetThe 1/4 inch shank countersink countersink bits are made of high speed steel with soomth finish, high hardness, anti-rust, strong and durable. SizeThe hex shank is easy to grip without burr and splined edges.And sizes: 5/46-15/64 width: 1/4inch; Width 1/8-11/32: 3/8 inch; 3/16-17/32 width: 0.59 inch. Scientific designtools Spiral fluted tools help evacuate chips and extract them from the cut to reduce clogging. p> Main functionThe countersink deburring bit can be used to deburr cross holes, deep holes, straight edges, curved edges. Available for MDF, plywood, acrylic, PVC board, plastic and soft metal. Buy with ConfidenceWe offer "TWO YEARS" warranty on items that confirm manufacturer's defect.We will respond within 49 hours on weekdays. Features: Groove cone for burr-free deburring and countersinking. Chip removal through the slot prevents chips from becoming clogged in the workpiece. Suitable for cutting steel, wood, plastic and light metals. Specifications: Name: Debur Milling Set Balance: Tolerance +/- 003" Material: 4241 High Speed Steel Color: Gray Package includes: 3 x Chamfer Deburring Bits