Step Drill Bit: 10 Hole Sizes, 1/4 in to 1 3/8 in, 1/16 in Step Increments, Black Oxide Finish
$100.02 Generated In Scholarship
Description
IRWIN MODEL 10235, The shanks on these step drill bits have three flats that help prevent the bits from slipping in the drill chuck during drilling. These cone-shaped bits have steps of increasing diameter marked along their cutting head. As each bit is pushed into a piece of sheet metal or other thin material, each step on the bit widens the hole. The bits also have a self-starting split point that prevents the bits from moving, or walking, when starting to drill, which eliminates the need for using a center drill to create a starter hole before drilling.