Letter D High Speed Steel Drill Bits are industrial quality drill bits ideal for production, maintenance and portable drilling jobs. Bisco Tool Supply's drill bits are for sale at wholesale prices. This Letter D Drill bit is made in the USA. Bisco's High Speed Steel USA Made Drill Bits have a .2460 Decimal Equivalent, 2-3/4" flute length, and 4" Overall Length. Letter Drills are surface treated, high speed steel and jobber length. These USA Made, High Speed Steel Drill Bits are dependable, general purpose drills designed to perform in a broad range of materials including iron and steel. Letter Drills bits have a 118 degree point and are surface treated with abrasion-resistant black oxide. Bisco Tool Supply sells all sizes of letter drill bits, metric drill bits, and numbered bits. Please call the Bisco Tool Supply sales staff toll-free at 1-866-247-2635 with any drill bit questions.