Snap-on's 9-pc. 3/8"-drive fractional low profile socket set (No. 209RF) and the 9-pc. 3/8"-drive metric low profile socket set (No. 209RFSM) allows users to access the tightest work areas. Use these socket sets to access under-dash cramped quarters; torque converter bolts; under cowls on late-model pickup trucks; and transmission bolts on transverse mounted engines. Manufactured from special alloy steel, these tools have a nickel/chrome plating to protect against corrosion.