The picture above is deceptive, you are buying 2 pack not 4 pack. The holes are too small for an 8mm lead screw or 6mm Nema23 stepper motor. I'll throw them up and drill the right holes, but that's not necessary.
π Silver Coupling Connector Accessory Fittings
3 Review
π© Durable Solid Steel Plated Shaft Collars Set for Efficient Industrial Applications
Climax 2C 175 Two Piece Clamping Plating
π₯ Climax 2C 200: The Ultimate Two Piece Clamping Plating Solution
Electric Guitar Strings Ernie Ball 2221 Regular Slinky - (10-46)
5 Review
Bearing 608- ZZ1MC3E (8x22x7) NSK//80018
4 Review
π§ High-Quality TIMKEN 6203 2RSC3 6203 2RS Bearing - Size: 17X40X12mm
FKG 99502HNR Bearing Width Pre Lubricated