20 bits for PHILLIPS® screws, TORX® screws and POZIDRIV®/SUPADRIV® screwsself-locking magnetic bit holder with quick-change functionin a compact, sturdy storage box transparent lid for quick check of completenesswith hexagon socket for quick use. Content 21 pieces: 1 bit holder with quick-change chuck and magnet. 3 cross-recess PH 3 bits, PH1, PH2, PH3