See: Exotek Racing

Exotek Racing have introduced a set of steel inner hinge pins for the Tekno EB410 and ET410. Made from heavy duty 3.4mm hardened steel, the inner hinge pins feature a larger center section helping to prevent bent or busted pins while keeping the stock 3mm diameter at the ends in order to fit the stock inserts and while also only slightly enlarging the arm holes to maintain arm strength. The set includes four steel inner hinge pins and a high speed drill bit to ream the arms to accept the larger hardened hinge pins.