Strong, hard-wearing tungsten carbide teeth for long life and performance. Enhanced gullet clearance for rapid waste removal . For plasterboard, bricks, aerated block, wood, plywood, laminate and PVC. Select the correct drill speed by material for cut quality and performance. Compatible with Silverline arbors. Strong, hard-wearing tungsten carbide teeth for long life and performance. Enhanced gullet clearance for rapid waste removal . For plasterboard, bricks, aerated block, wood, plywood, laminate and PVC. Select the correct drill speed by material for cut quality and performance. Compatible with Silverline arbors.