Meterk 4pcs Hole Drill Bit Woodworking Hole Saw Mortising Chisel Steel Drill Bits Set 1/4 inch, 5/16 inch, 3/8 inch, 1/2 inch for Wood

material: made of high hardness carbon steel, hole drill bit is solid, durable. Excellent craft: each, went through process, has smooth surface for less friction, sharp for better work. Good design: U-shape is great for discharge of wood chips, to improve drilling efficiency. Various dill bits: set contains different size drill bits, enough, satisfied for multiple demands. Wide application: it works with mortising machine, very suitable for drilling wood, like MDF, particle board, pine wood, basswood, etc.