$HAMMER STAPLER R311 HD (USE WITH TYPE 140 8-12mm STAPLES). Offering superior precision and working life, the R311 is an effective hammer tacker able to tackle a wide range of demanding, professional tasks. A smart, newly-developed opening mechanism ensures no parts can fall out when refilling. The perfect solution for high-frequency fastening of roofing and insulation material, damp proof coursing, plastic wrap, labels or posters.