Camilo

Actually, I still disagree that a 1/4 to 3/8 (or similar) adapter would in any meaningful way affect torque. It has virtually no additional length compared to a socket or a hex key and therefore as little or no comparison to the type of torque loss the guy above was describing. He was talking about extensions with significant length. I really don't believe for a minute that a socket adapter, with it's 1-2 cm of length, would affect torque, and this is even more so at the low torques for most bicycle applications - just not enough force to twist and deform a 1-2 cm. adapter. You may be technically correct, but not in any meaningful, or dare I say measurable? way.