Material: Drilling limit ring: 304 stainless steel; Hex wrench: 304 stainless steel; Storage box: plastic. Size: Drilling limit ring: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 9.5mm, 10mm, 12mm, 14mm, 16mm; Hex wrench: 59*22mm/2.3*0.87", 56*17mm/2.2*0.67"; Storage box: 72*52*16mm/2.8*2*0.63". Attention: Do not move after tightening the set screw.