The Stanley FatMax 19-Piece Masonry drilling and Impact Driving Set contains a variety of drill bits and screwdriver bits suitable for rotary hammer or cordless drills. It includes Phillips, Pozi and slotted impact screwdriver bits with torsion zone for greater bit strength, along with 5 hammer drill bits with feature tip for drilling concrete, masonry and ceramic tiles. Featuring a connectable case that allows multiple sets to be stacked and locked together, compatible with the TSTAK Caddy to hold all your accessory sets in one place and easy screwdriver bit removal and retention for user convenience. This Stanley FatMax set is the strongest most precise drill bit for fast drilling in concrete, natural stone and masonry. It also gives excellent performance in Cordless drills. Features and Benefits Easy bit removalEasy screwdriver bit removal and retention for user convenience. Impact bits with torsion zoneImpact screwdrivers bits with torsion zone for greater bit strength. Stro