Precisely machined for a perfect fit, the LRT-4 removes and installs lockrings found on many Shimano® direct-mount chainring systems. Features a 36 mm hex fitting for use with the Park Tool TWB-36 Crow Foot and a torque wrench (each available separately) to achieve proper torque. Precisely CNC-machined from 6061 aluminum for a perfect fit and to prevent marring expensive parts, with a machined flat face for optimal lockring engagement.