The Hollow Point is a replacement guitar part specifically designed to help players, technicians or anyone performing guitar repair to set the intonation on a double locking guitar tremolo accurately and efficiently. They have been designed to reduce much of the headache that can be associated with repositioning the bridge saddles while tuning and setting the intonation on a guitar. Constructed of solid brass, each Hollow Point is proudly designed in the USA. In addition to increasing the efficiency and ease of set-up, other benefits include improved appearance, increased mass, sustain and tone. Each set of Hollow Points comes with: 6 Hollow Point Intonation Inserts , 6 Threaded Set Screws, 1-3mm Hex Wrench, 1-2.5mm Hex Wrench, and 1-2mm Hex Wrench.