As an Amazon Associate, we earn from qualifying purchases. Cat40 end mill holder 1/4? x 4.00? Sowa Tools . 522-018 Attributes Brand name, Manufacturer name, ManufacturerSowa Tools Attribute001.10? Attribute011/4-28 set screw Attribute02Certified balanced to 30,000 rpm Attribute036.35 Attribute040.250 Attribute05Yes Attribute063 coolant options: throught the flange, through the spindle, through the body. Comes with O-ring seal for non-direct coolant operations AttributeKey00tool hole depth AttributeKey01set screw AttributeKey02balance AttributeKey03bore diameter mm AttributeKey04bore diameter inch AttributeKey05coolant AttributeKey06specification InStockStringTrue Extra Product NameCat40 end mill holder 1/4? x 4.00? moq, multiple, tierMinQty11 MPN, SKU522-018 qtyInStock-2 qtySourceInStockString tierPrice1161.38 Distributor offers SellerSKUMOQIn stockMultiplePrices tmttoolbox.com522-0181-211 @ $161.38