Record Power 62377 11-3/4" / 295mm Remounting Mega (similar to Cole) Woodlathe chuck Jaws with bonus Jumbo Bumper Set (Compatible with Record Power SC3, SC4, Nova Supernova 2, G3, & Titan) Similar to Cole Jaws, with expansion capacity up to just over 12" (see description for details) Bonus Angular large bumer set for sturdier re-mounting Designed for Record SC3 and SC4 Woodlathe Chucks Also Compatible with Nova Supernova 2, G3, & Titan Chuck