Hosco Groobar Nut Slot Assist Tool, 4pcs in set: H(High), M(Medium), L1(Low), L2(Low). Material: non-hardened steel, Size: 12.5mmx80mm, Thickness: H=0.065" (1.65mm) / M=0.056" (1.42mm) / L1=0.050" (1.27mm) / L2=0.042" (1.07mm)