Blade Model:#10,#10A ,#11, #12,#12D ,#13#14,#15, #15C,#16#18, #20, #21, #22, #23, #24. #3 Handle Fits for #10,#11,#12,#15 Blades,used for cutting shallow small parts. #4 Handle Fits For #18,#20,#21,#22,#23,#24 Blades,for shallow cutting. #7 Handle Fits for #10,#11,#12,#15 Blades,for deep cutting. Features: ★Sterile Single-Use ★Carbon Steel ★Sterilized By GAMMA Radiation 25KGY ★EXCELLENT QUALITY ★100 % SATISFACTION GUARANTEED.