1, Since Dec 1st, 2023, these two holes are M2.5 threaded for using M2.5 screw with a washer to hold the end of the string quickly.2, Clove Hitch knot is a strong and easy use method for tightening the string. This module can be used with BL-300/BL-400 series slides as well as most other structural parts.
Weight: 3.20g CAD STEP: BL-PM-01B