Technical Specification Item Taper Shank Tool Holder Taper Size PSK40 Projection 55mm Coolant Fed Coolant Through Nose Dia. 48mm For Shank Type Straight with Lateral Driving Surface For Use With Cutting Tools Material - Machining High Speed Steel Overall Length 3.11 Shank Length 55mm Standards ISO 26623-1 Taper Type Polygonal This listing is for each. Style : ISO 26623-1 Shank : PSK 40 Shank Length : 55mm Overall Length : 3.1100 in For Use With : Cutting Tools Item : Taper Shank Tool Holder Length : 3.11 Shank Dia. : 16mm Size : 16mm Taper Size : PSK40 Projection : 55.00mm For Shank Type : Straight with Lateral Driving Surface Taper Type : Polygonal Nose Dia. : 48.00mm Coolant Fed : Coolant Through Material - Machining : High Speed Steel Standards : ISO 26623-1 Country of Origin (subject to change) : Germany