Contractor-grade chalk snap-lines with 100 Ft. (30m) of ultra thin premium-grade braided line. Smooth gear-drive winding, up to 3 times faster than standard snap-lines. Compact, fits comfortably in the palm of your hand yet holds up to. (45 gm) of chalk. Durable, heavy-gauge die-cast aluminium case sealed with an elastomer gasket. Positive gear-lock line hold, automatically releases during rewind. Also features a folding crank, easy-fill spout, and a tool to facilitate line replacement. Includes trial-size bottle of blue Micro Chalk. Blue case. KEY FEATURES: ・Specially crafted braided line creates Ultra-Thin 0.02 in ( 0.5 mm ) lines ・Large gasket-sealed refill port ・Heavy-duty aluminium case ・Smooth-running five-gear winding mechanism Inner Box of 4 / Outer Box of 24