SPADE WOOD DRILL BITS 1, High carbon stell material 2, Polished surface ... Spade Bit Sizes from 1/4 to 1-1/4 (6mm to 8mm) Black & Decker 14-Piece Spade Bit Set Key ... Sizes from 1/4" to 1-1/4” (6mm to 8mm)1/4”,5/16”,3/8”,7/16”,1/2 ... 13/16”,7/8”,15/16”,1”,1.1/4”(6mm,8mm,10mm,12mm,13mm,14mm,16mm,18mm,19mm,20mm,22mm,24mm ... BenefitsFor easy bit changes For large variety of drilling in wood SPADE DRILL BIT