The Combination slot head includes both the classical and steel string template. Also included are the 1/4” bushing for the steel string and 13/32” for the classical. The bushing centers are 10.5 mm from top of head stock. The templates are designed for 1/4” spiral down cur bit using a 3/8” OD template guide and 7/16” OD to remove most of the material. Also available is the accessory kit that has the bit and template guides included.