1pcs Yellow:Handle: 1/4 4pcs Yellow: Material: hard alloy Product size: as shown Weight: about 120g Blade width: 1/8-1/2 Diameter of handle of carving knife: 1/4 ; Usage: 6.35mm/0.25, 12.7mm/0.5 center shaft, used in electric and manual engraving machine. The 6.35mm/0.25 handle can be clamped by self-tightening to carve the machine and product 12pcs Yellow: Blade width: 6.35mm-32mm/0.25-1.26 Diameter of handle of carving knife: 1/4 Usage: 6.35mm/0.25 center shaft, used in electric and manual engraving machine. The 6.35mm/0.25 handle can be clamped by self-tightening to carve the machine and product 12pcs Red: Cove Box Bit: 12.7mm Bearing Cove Box Bit: 22mm; Dovetail Bit: 12.7mm; Bearing 45° Chamfer Bit: 32mm; Bearing Flute Trim Bit: 12.7mm ; Straight Bit: 16mm; Rounding Over Bit: 22mm; Straight Bit: 12mm; Straight Bit: 6mm; Rounding Over Bit: 28.6mm; Grooving Bit: 12.7mm; Roman Ogee Bit: 25mm; 15pcs Red: Material: 45 # carbon steel, YG8 alloy Color: As picture shown Packing: wooden box Shank Diameter: 1/4:6.35mm/ 0.25 Wood Box Size: 1/4:17.3cm*12.4cm*5.1cm/ 6.8*4.9*2 (L*W*H) 100Pcs Red: as picture shown Included: 1/4/12/15/100 x Router Bits