4mm Cutting Dia 6F HSS Straight Shank Machine Chucking Reamer 5pcs Product Name : Chucking Reamer;Material : HSS;Accuracy : D4 Flute Number : 6;Cutting Diameter : 4mm/ 0.157" Cutting Depth : 16mm/ 0.63";ShankSize : 25 x 4.2mm/ 1" x 0.16"(L*D) Total Length(Approx) : 7.5cm/ 3";Main Color : Silver Tone, Gray Weight : 39g;Package Content : 5 x Chucking Reamer