Activate woodworkers to drill holes without passing through the material when a clean, accurate bottom to a hole is required. Drilling depth no more than 50mm.Suitable for piston drill, drill, vertical hand drill, power drill, motorized drill and magnetic tape type drilling machine, etc.Unique Design: The tridentate head design and scientific principles of carpentry cutting, it features a high drilling efficiency, and a smooth chip removal.the hole is sharper, more durable and not easy to rust.perfect for drilling accurate flat bottom holes and making an arched opening without chipping in any thickness of wood. In alloy and with thick edge, it can solve the problem of breaking of old knife and it greatly improves the strength of the blade.Used for drilling in wood work in preference to drills and flat pieces whenever a very clean and precise hole is neededDesigned to make professional holes, flat bottom and clean holes For use with Pillar drill (Drill Press). Fast disposal of waste. Precision land for intensive use and sharpened easily, they can easily enlarge existing holesAdvantages:longer life, high hardness, rust, good quality.The hinged blade provides a true, accurate, clean, flat and even bottom hole for quick removal of debris or debris to ensure your work efficiency.The perfect exercise is to drill holes in cork, hardwood and corkPerfect installation of spherical points, drawers, perforated wood and plywood Under the direction of a circular edge, drill anyin any direction.colour:SilverMaterial:Cemented carbidesize:15mm; 20mm; 25mm; 30mm; 35mm; 40mm; 45mm; 50mm; 55mm; 60mmPackage Contents:10 x Forstner Drill BitOnly the above package content, other products are not included.Note: Light shooting 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.