29 pc Cobalt M 35 Metal Index Drill Bit Set, 1 16 in to 1 2 in Cut dia no checkout and binding of moving parts Will and binding of moving parts Will not mar paint [Nom] 4 in Face Plate Thickness 7 16 in Face Width 1 2 in Hazmat NO Height [Nom] 3 7 8 in Jan San Catalog NO Length [Nom] 4 3 8 in No Constructed of M 35 5 percent cobalt high speed steel for super abrasive resistance in tough metals Cobalt steel extends cutting edge life and maintains cutting life after resharpening Extra hard drill for greater wear 135° split point tip starts on contact cuts with less force Removable cartridges: easy to carry bits from case to worksite