600Pc 10 X 1-5/8 Backer-On

Gimlet point. No. 2 square drive prevents bit from slipping. Special ribs under the head countersink into material for flush seating. Serrated thread design reduces installation torque and provides superior holding power. Corrosion-resistant finish prevents unsightly rust from bleeding into tile. Specifically designed and recommended for use with fiber cement backerboard. Common applications: Bathtub/shower, countertops, floors, sink blacksplash.No. 23410: 10 x 1-5/8", 150-piecesNo. 23400: 10 x 1-1/4", 200-piecesNo. 23415: 10 x 1-5/8", 600-piecesNo. 23405: 10 x 1-1/4", 800-pieces