Suitable for medium and large holes between 15-35mm, which is convenient for manual work. The center point of the drill bit is sharpened on all sides and pre-cut on all sides to achieve precise drilling without cracks. It can be used for hardwood and softwood, as well as various panels such as oriented strand board, veneer and slatted board. The rotary shank can be used with all cordless drills and screwdrivers with either 10mm or 13mm chucks. We offer a full range of general power accessories and tools hand drill for DIYers and professionals. A set of 5 drill bits - the most common sizes in one set: 15, 20, 25, 30 and 35 mm. Forged and polished drill bits that will not crack even when drilling large diameters. drills and all turning drills. Package size: 16cm x 12cm x 4.5cm Quantity shipped: 1 box, containing 5 hole openers