4Mm Width Single Ended Neutral Hand Externalparting & Grooving Insert, Grade-Suitable Formachining , Left Hand Top Screw Clamp Vertricalexternal Parting & Grooving Holder, Shank Size 25*25, Max. Depth , Right Hand Top Screw Clampvertrical External Parting & Grooving Holder,Shank Size 25* 25, Max. Dept Quantity: 728