This tool makes those hard to reach carburetor adjustments easy and safe. Aluminum handle includes index marks for accurate tuning. Gear driven with a 1/4" hex head. Complete with most all common heads needed, but any 1/4" or 6 Milimeter hex bits will fit. Includes strait slot, Phillips, D shaped pilot bit, 6 Milimeter hex jet bit and 1/4"drive bit. 17 3/4" long with max torque 55in. lbs. Driver with bit installed at 90-degree is 1-1/4" tall.