A. AJ-059BHB Big Hook Blade Roofers prefer our deep cut big hook blade. Fits most utility knives. 5 PACK JUST $2.99 or 100 PACK JUST $44.95 B. AJ-059BTB Bowtie Blade Blade has four sharpened edges. Fits AJ-057MCGA and AJ-057RK3Y knives. 5 PACK JUST $3.99 C. BS-UTBL-5P Utility Blade High quality standard utility knife blade. 5 PACK JUST $1.19 or 10 5 PACKS JUST $10.95 RETURN TO UTILKN-1 Retractable Knife Button projects and retracts blade to three positions. Heavy duty die cast handle provides blade storage. $2.50