High Precision CAT 40 Collet Chuck, Taper to Bore Runout <0.0001" Balanced G2.5 x 30,000 RPM, Made out of High Quality Chromium steel, H5 Bore Tolerance, DIN AD+B Coolant Capabilities, Taper Shank Ground to AT3 Accuracy ( Or Better), CAT40 DRAW BAR THREADS 5/8"-11, 100% inspection quality control in the USA. Mirror Bright Finish Shop's Choice VETERAN OWNED........ HIGHEST ACCURACY: Taper to Bore Runout < 0.0001" T.I.R. HIGHEST TOLERANCE: H5 or Better Bore Tolerance. COOLANT CAPABILITIES: DIN AD+B Coolant. Through Spindle and Flange. HIGH QUALITY STEEL: Made of High Quality Chromium STEEL.. PRECISION BALANCED: G2.5 X 30,000 RPM CERTIFIED country of origin: China warranty_type:Manufacturer High Quality Steel, Taper Shank Ground to AT3 Accuracy or Better,Rotary Tool Holder, , 100% USA Quality Control, Precision Tool Holding, Veteran Owned Business CAT 40 Collet Chuck, Precision Tool Holder, Coolant Holder, Tool Holder, Collet Chuck, Precision CAT40, CAT 40, Rotary Tool Holding, Rotary Tool Holder, Work Holding, Tool Holding, Drill Holding, ER Collet Chuck CAT 40,ER Collet Chuck Warranty 100% Guarantee to be Free from any Manufacturing Defects. 100% Customer Satisfaction GuaranteeCapabilities, Taper Shank Ground to AT3 Accuracy ( Or Better), CAT40 DRAW BAR THREADS 5/8"-11, 100% inspection quality control in the USA. Mirror Bright Finish Shop's Choice VETERAN OWNED........