Strong Steel Stick Renewal Composite, 4 oz, Stick, Black Gray ORS NASCO Self retracting spring action returns blade Self retracting spring action returns blade safely into the housing when not in use Interlocking nose reduces blade wobble Ergonomic grip fits comfortably in the hand Two blade positions 2mm extension for box cutting and full extension for general use Tool free entry hydraulic fluids and built up grime on all washable surfaces Non abrasive drilled and painted in 20 minutes Plugs and seals leaks Permanently fill gaps & holes in metal Hand kneadable ready to use stick Hardens like steel in 20 minutes Can be machined