1,[5 Pcs Set] This countersink drill bit set includes 5 pieces with diameters of 2.8mm, 3.0mm, 3.2mm, 3.5mm, and 4.0mm, providing versatility for various drilling needs. 2,[Sturdy Construction] Our countersink drills are made of ABS, 40 Cr V steel, and high speed steel, offering strong bending resistance, and wear resistance for long lasting performance. 3,[Efficient Chip Removal] The countersink drill bits feature a design that allows for efficient chip removal, quickly discharging debris from the hole to enhance drilling efficiency. 4,[Adjustable Depth Stop] With adjustable depth stop functionality, these countersink drill bits can be set to meet different depth requirements for countersinking and drilling tasks. 5,[Wide Applications] Suitable for drilling in wood, plastic, soft metals, fiberboard, aluminum alloy screws, and other materials, this countersink drill bit set is versatile, practical, and ideal for a range of projects. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.