5 premium tungsten carbide scribers with magnetic tips collect metal shavings during engraving, pick up small screws (1-5mm), and securely attach to metal surfaces. Rotating nib system allows 45 angled marking for tight spaces. Upgraded 25-piece set includes 5 scribers, 20 safety-capped replacement tips, and 8inch stainless ruler (dual scales). Aerospace-grade aluminum handles withstand 200+ lbs pressure, 3X harder than standard kits. Diamond-cut knurling ensures non-slip grip even with oily hands. Shock-absorbent tip protector prevents accidental injuries, meeting workshop safety standards. HRC90+ tungsten tips engrave hardened steel, glass (Mohs 6.5+), ceramics & wood. Tested on CNC-machined parts and jewelry molds with 0.5mm accuracy. 20 replaceable tips (pre-installed safety caps) 5-year continuous use. Color:As Shown Material:stainless steel Package Contents: 1set * carbide scribe Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.