Machined from 7075 Al alloy, laser etched with kcnc
Will fit most chainrings and spiders - Shimano XTR (not 960, see XTR960 listing), XT, Truvativ, etc.
Size - Female (inner side) shank:diameter 10mm, length 6.5mm. head: diameter 12mm, length 1.5mm (total length 8mm)
Size - Male (outer side) thread length 8.5mm, head diameter 12mm, length 2mm (total length 10.5mm).
4 bolts for 4-arm spiders.
Weigh 8g for 4 on my scales.