1 quick-change tool holder head incl. Up to 12mm clamping height for external and internal machining. No more annoying underlining to get the turning tool to the turning center. Quickly change various tools, for. EMCO Unimat 3 +4 + PC and other small lathes with T-slot width 8mm. 171 390 + 3x 171 400. Quick change holder with 3 holder for lathe EMCO Unimat 3, 4, PC new. 3 holders up to 12mm clamping height for external and internal machining, No more annoying underlining to get the turning tool to the turning center, Quickly change various tools, for EMCO Unimat 3 +4 + PC and other small lathes with T-slot width 8mm, EMCO item no. 171 390 + 3x 171 400 Quick change holder with 3 holder for lathe EMCO Unimat 3, 4, PC new.