Description The PROOF Vanguard is a bolt-action EDC pen machined from solid billet 6061 aircraft-grade aluminum in a satin anodized finish. The internals are stainless steel and the pocket clip is brass, machine-finished so it sits brighter than the body. The Bolt Action A thumb lever on the side of the barrel runs the tip out and back. It is a deliberate mechanical throw rather than a click-top. The Refill Ships with a black Fisher Space Pen #SPR4 cartridge, a pressurized refill that writes at any angle and in wet or cold conditions. Spec Body: solid billet 6061 aircraft-grade aluminum, satin anodized Mechanism: bolt action Internals: stainless steel Clip: brass, machine-finished Included refill: Fisher Space Pen #SPR4, black Maker: PROOF