191 Disc Collars Hole Styles:
DS1 (.25" x .75"), DS3 (.75" Round), DS4 (.875" Round),
DS8 (.375" x 1"), DS11 (.25" x 1")
Material: 6061 AL
The Sequel Model 191 Disc Collar makes setup much easier than using Disc Brackets. The Disc Collar is bolted to a Sequel Disc using two 1/4-20 bolts (not included). Another 1/4-20 bolt is used on the side as a set screw. Adjust the Disc to the required location and tighten the set screw to securely hold Disc to the spine.
Vertical space is saved by using one Collar with two Discs. In this situtation, 1/2" long bolts should be used to attach the Discs to the Collar.