Holder for Silva spiral flute seat tube reamer no. 407. The handle is the LAN71 head tube mill handle only (so, if you already own the LAN71 head tube mill you need only purchase the arbor and reamer). The arbor is machined to mate to the handle securely with an 8mm. socket head cap screw and the Silva no. 407 spiral flute seat tube reamer is also secured to the opposite end with an 8mm. socket head cap screw. Holder complete with handle and arbor but without the reamer is $65.00 Arbor only is $25.00. Holder complete with handle, arbor and reamer is $210.60. To order, please contact Andy. PayPal and good check accepted.