Description: Model: ER8M Material: High Carbon Steel Size(Length x Open): Approx. 8x0.5cm/ 3.15x0.20 inch for Clamping Nut CNC Milling Lathe Collet Chuck Harden, wearproof, and durable, with skidproof cover Specification: Wrench Color: Black Cover Color: Red Package Includes: 1 Piece of ER Wrench Spanner Note: Please allow 1-3mm due to manual measurement, make sure you do not mind before you bid. The colors may be different for the different display, please understand