6 Pc Spade BIT SET 1/4" Shank Wood Boring Drill Bits 3/8 1/2 5/8 3/4 7/8 1" 6 Piece WOOD BORING "SPADE" DRILL BITS Professional's tool choice for fast, clean holes through studs, joists & other soft woods 6-bit set in sizes #10 (3/8 in.), 1/2, 5/8, 3/4, 7/8 and 1 inch Durable tempered high speed steel holds up to frequent use; 1/4 in. shaft diameter Popular 6 in. length, 1/4 in. hex shank gives sure hold in chuck, fits adapters and extensions