Blade Model:#10, #11, #12, #15, #18, #20, #21, #22, #23, #24,#25,#12D,#15C #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.