About Park Tool Left Hand Threaded T47 Guide (#648L)
The 648L is an M47 x 1.0 left-hand threaded standard guide for use when facing bottom bracket shells with the BFS-1 Bottom Bracket Facing Set and 690-XL Oversized Facer. This guide is used on the drive side (right side) of the bike.

Features
M47 x 1.0 left-hand threading

Sized for T47 bottom bracket shells

About Park Tool
Park Tool are the world’s largest bicycle tool manufacturer. Located in St. Paul Minnesota they have been designing and manufacturing bicycle specific tools since 1963. Their dedication to quality and innovation have gained them the reputation for producing the best bicycle tools in the world.