Forstner drill bits perfect for producing clean cut flat bottom holes, pocket holes and through holes. Forstner tip hinge boring bit set is made of alloy with excellent workmanship and durability. 2 Flutes Designed to make professional flat bottom holes, pocket holes, and clean through holes. The saw tooth cutting edges are great for drilling 90-degree holes. Suitable for hinge installation,wood processing repair and model making. Suitable for precise drilling and high quality finish into woods. Can open any hole you need on all kinds of wood, wood products, plastics, plywood and other materials. Material: steel Color: Silver Drilling Material: MDF/Wooden Material Diameter: 15mm Size: As picture shown Package Contents: 1* 15mm Hole opener Only the above package content, other products are not included. Note: Light 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.