Features [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 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. [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. [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. [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. Specification: Item Type: Countersink Drill Bit Set Material: ABS, 40 Cr V Steel, High Speed Steel Drill Bit Specification: Approx. 2.8mm / 0.11in, 3.0mm / 0.12in, 3.2mm / 0.13in, 3.5mm / 0.14in, 4.0mm / 0.16in PackageList: 5 x Countersink Drill Bits 2 x Wrenches 1 x Storage Box Package List 5 x Countersink Drill Bits 2 x Wrenches 1 x Storage Box