FASCO F1B 84-16 Stapler: Delivers European reliability, power and refinement. Drives 1/2-Inch wide crown 84 series staples (interchanges with Bostitch SBNK 4023) that are easily found. Bottom load design provides ease and speed when reloading, changing sizes or clearing a jam. Staples range all the way from 1/4-Inch to 5/8-Inch leg lengths. Magazine opens with easy, one finger latch. Reversible bumper for added parts life. A comfortable, fast, and durable stapler for upholstery and industrial applications.