Figure 1: The different components of the glenoid aiming device. 1 = K-wire of 2 mm diameter. 2 = Different glenoid components from 10 mm to 17 mm, left and right specific. 3 = Pin for fixation of the guide into the most medial point of the scapula. 4 = K-wire guide. 5 = Adjustable mechanism to measure the spinal scapular length (SSLdev). SSLdev: Spinal scapular length with the device