Tacwise 91 Staple Narrow crown staple ideal for semi-pro/DIY wood to wood applications. Compatible with the Tacwise 191EL, Duo 35 and Duo 50, alongside other popular brands in the market. Tacwise Type 91 Divergent Point Narrow Crown Staples 18mm (1000 Pack). Tacwise 287 91 Narrow Crown Divergent Point Staples 18mm -Electric Tackers Pack 1000. Tacwise galvanised narrow crown staples, ideal for subflooring hardwood. Divergent point staples twist as they enter the timber creating greater staple retention. Suitable for 191EL/S Pro Stapler/Nailer, Tacwise 35 Duo Nailer/Stapler, Tacwise 50 Duo Nailer/Stapler, Ranger 40 Duo and other major brands in the market within their range capacities. Size: 18mm. Pack Quantity: 1000.