29-pc Cobalt M-35 Metal Index Drill Bit Sets, 1/16 in – 1/2 in Cut Dia. Irwin 29-pc Cobalt M-35 Metal Index Drill Bit Sets WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically-treated lumber. Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles. Finish: Black Oxide Measurement Type: Inch Graduation(s): 1/64 in Includes: 29-piece set in metal index case includes drill bit sizes 1/16 in to 1/2 in in 1/64 in increments Material: M-42 cobalt High Speed Steel Quantity: 29 per set Cutting Diam [Min]: 1/16 in Cutting Edge Material: HSS Cutting Diam [Max]: 1/2 in Cutting Diam [Nom]: 1/16 -1/2 in Wt. 4.4 lb Point Angle: 135.