and . Made of high-quality materials. Equipped with hexagon wrench, easy to install. 1/4inch hex shank can be used with power drills and quick change chucks. The adjustable stop collar allows you to either set the screw head flush with the or drill. Suitable for woodworking drilling, counterbore. The actual product may have slight color difference or difference, which not affect the use Product name: Countersink Drill Bit Color:Blue Material: Metal Size: 2.8x8mm,3x8mm,3.2x8mm, 3.5x8mm Package Contents: 4 x Countersink Drill Bits with wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.