For postmortem work, trimming light plaster casts, and similar forceful cutting Strong plastic handles provide secure palm-fitting grip Bard-Parker™ brand Blades slide on smoothly and securely (sold separately) Use blade sizes 10, 11, 12, 15 for handle size 5 Use blade sizes 20, 21, 22, 23 and 25 for handle size 6 Use blade size 60 for handle size 8