The mounting holes are already drilled and tapped. Customer just need to use their own lathe to lightly surface the front surface and turn very little on the registration boss according to the actual recess of the chuck, then bolt the two parts together with the included bolts. This work just like assembly a 3-jaw chuck with a new back plate.As this final assembly work is done on your own, final use lathe, usually can reach the highest TIR accuracy. Can Use Any Size 5C Collet From 1/16 through 1-1/8. Scroll and Pinion Design just like 3-Jaw Chuck, Operated With Chuck Kay. Scroll & Pinion Precision Machined and Hardened. 5C 5Collet Lathe Chuck Closer With Semi-finished Adp. Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. If there is any fault or problem with the product, please don't be shy to express it, we will solve it at the first time. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Toolholding\Indexable Inserts". The seller is "find-mall" and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South Africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Bahrain, Republic of Croatia, Malaysia, Brazil, Chile, Colombia, Costa Rica, Dominican Republic, Panama, Trinidad and Tobago, Guatemala, El Salvador, Honduras, Jamaica, Antigua and Barbuda, Aruba, Belize, Dominica, Grenada, Saint Kitts-Nevis, Saint Lucia, Montserrat, Turks and Caicos Islands, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, Ecuador, Egypt, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Luxembourg, Monaco, Macau, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Vietnam.