TSTAK compatibility allows you to store all your accessory kits in one place. TSTAK compatibility via the large Tough Case. Toughcore - tapered central core increases stability and durability, and improves fracture resistance. Increases strength and resistance when drilling deep holes where increased side loading occurs. Reduces flute flexing relative to the shank, preventing bit breakage. Wear mark - indicates drilled holes are at the required diameter. Ideal for precise installation of mechanical anchors. Two-stage helix - increases drilling efficiency. Speeds up removal of concrete debris from the tip, lowering operating temperatures and increasing drilling speed. (10) SDS Plus Extreme 2 Masonry Drill Bits (1) 5 mm x 110 mm (2) 6 mm x 110 mm (2) 6 mm x 160 mm (1) 7 mm x 160 mm (1) 8 mm x 160 mm (1) 9 mm x 160 mm (1) 10 mm x 160 mm (1) 12 mm x 160 mm **