Diameter: For 6.2mm Shaft Fits any bolt with diameter 6.2MM.
Easy and durable usage, more competitive price
Automatically lighted after shoot
Quantity:3pcs Color: Red,,Please DO NoticeThat It's for crossbow not compound bow
After arrow retrieval simply push back activator switch located in side of nock to the off Battery ( non-replaceable ) last about 24-48 hours