The standard 4mm joint set has been improved and renewed! Grooves have been carved into the A-E joints to hold the shaft and make it easier to pull out, while still preventing "unintentional disconnection"! In response to fan feedback, we have also increased the quantity of joints that are in high demand. Great for connecting parts of blockers FIORE and mechanical VLOCKer's! Joint Size: 4 mm (0.16 in) Includes 5 runners - A joint 8 pcs - B joint 12 pcs - C joint 4 pcs - D joint 12 pcs - E joint 4 pcs - K joint 12 pcs - S joint 6 pcs - Q joint 4 pcs