Cat 40 Tool Holder Schunk CAT40 5/16" Shrink Fit Tool Holder 5" Pro 40.844.5/16Z 5/16 End Mill GS Tooling 522264 BT40 1/2 x 2.5 Direct Coolant End Mill Holder... Used for layout, set-up, checking heights, depths and setting angles Shank Type: Taper ShankTaper Size: CAT40 Hole Diameter (Inch): 5/16Nose Diameter (Decimal Inch): 0.87Projection (Decimal Inch): 1.38Through Coolant: YesNow 3 Coolant Options All In One! End Mill Holder - Cat 40 - 20,000 RPM Coolant thru the spindleDIN Coolant thru the flange optionCoolant thru the bodyAll Ground BodyPremium balanced to 30,000 rpmComes complete with certificate AI Neck Fan, 6 Speeds Adjustable Portable Personal Fan Rechargeable, 6000 mAh Battery Faster Cooling Wearable, Ultra Quiet for Home, Office, Travel, Outdoor