[Features] ●Suitable for drilling concrete, blocks, mortar, stone, deck plate + concrete, etc. ●Performance has been further improved by adopting 3 blades. ●Improved rebar performance and positioning performance. - It penetrates the deck plate. ●Drilling close to a perfect circle has been realized. ● Uses a 3-thread screw shape that is suitable for the power and number of revolutions of rechargeable HAMMER CASTER drills. ●Pack of 5 delta shaft types.