HSS Tool Bits 1. Shape: round, square, rectangle; 2. Allover Length: 4", 6", ... 8", 12"; 3. Material: M42, M35, M2, W9, F4,W4 HSS ... tool bits:1.It has different shapes: round tool bits, square tool bits, rectangle tool bits;2. Application: Universal square ... price;6. SIze: Overall length:4",6", 8", 12"; HSS tool bits