Attributes . Includes: Steel Expander 1 5/8? ? 2? Collet, Steel Expander 2? ? 2 1/2? Collet, 2 3/8? ? 2 3/4 ? Collet, 2 3/4? ? 3 1/8? Collet, 3 1/8? -3 1/2? collet, 3 1/2? ? 7/8? Collet, & 3 7/8? ? 4 1/4? Collet . Names