Model&Material: Ordinary #3  #4  #7:Stainless Steel Graduated #3:Japan stainless Steel Graduated #4:German stainless steel Adjustable #3:Stainless steel  #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: ★EXCELLENT QUALITY ★100 % SATISFACTION GUARANTEED.