KANZAWA K 304 Counterbore No. 2 Size:K 304 (34~80MM) PrecisionBits for Phillips screws 10 pcs Size:99MM PrecisionBits for Phillips screws 10 pcs T 10 Tamperproof Star Bit Socket 540 T 15 Tamperproof Star Bit Socket T 20 Tamperproof Star Bit Socket T 25 Tamperproof Star Bit Socket T 27 Tamperproof Star Bit Socket T 30 Tamperproof Star Bit Socket T 40 Tamperproof Star Bit Socket T 45 Tamperproof Star Bit Socket T 50 Tamperproof Star Bit Socket T 55 Tamperproof Star Bit Socket Socket Holder With this one drilling machine (including electric drill with stand) 13 mm or more Drilling range Blade small Φ 34 to 56 mm · blade large Φ 56 to 80 mm Main applicable material and