Stainless steel handles with a measure or graduation on the reverse side to assist with training, marking of the correct surgical site and trauma injury investigations. Fitment no. 4 for blades - including no. 18, 19, 20, 21, 22, 22A, 23, 24, 25, 25A, 26, 27 and 36. This device does not carry the CE and UDI markings, thus falling outside the scope of the Medical Device Regulatory system.