The Pin Chuck Set with Three Collets is specially suited for holding micro drills. Milhard Sales Pvt. Ltd. Manufactures Pin Chuck Set with Three Collets. Milhard Sales Pvt. Ltd. Supplies Engineer`s Squares including solid Beveled Edge type, Dial Comparator Stands, Thickness Gauges, Precision Machine Vices, Knife Straight Edges, Steel Parallels, Precision Block Levels, Hardened Steel Vee Blocks, Magnetic Dial Stands, Stereo Microscopes, etc. The Pin Chuck Set of Series CH has three collets which can be fitted in the pin chuck.