Cheap And Discounts BT40 APU16 Range:1-16mm Integrated keyless self tight Drill chuck for milling lathe BT40 APU13 Range:1-13mm Wholesale. Buy Directly From Merchant Shop4761024 Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.