Makita B 44747 Impact GOLD SQ2 Square Insert Bits 25 Pack 1 Inch 1 4 Hex Shank (Xtreme Torsion Technology, High Torque Fastening, Heavy Duty Construction) Radius Round Nose Bit and component parts across rough and component parts across rough construction terrain and chronic low light battery drainage inside tight structural bays by combining a 200 degree articulating hinge with an interactive multi stage dimming circuit that doubles cell operating runtime up to 12 hours Key Performance & Safety Features Deck Construction: Fastening heavy duty deck boards using precision fit tips that eliminate fastener cam out