Handle model: BT40-TER20-4 " Blessing scope: M2-M16 Including universal chuck models: ER20-3mm 1pcs,ER20-4mm 1pcs, ER20-5mm 1pcs,ER20-7mm 1pcs,ER20-8mm 1pcs,ER20-9mm 1pcs ,ER20-12mm 1pcs,ER20-13mm 1pcs Tapping range: M2-M16