#7R holders are only for use with the Aloris Wedge-Lock Carbide Insert blades, T-type blades or with bevel (wedge-shape) blades having parallel top and bottom edges. For bevel (see drawing) as well as T-type blades. Enables you to cut-off close to chuck. Absence of vibration prevents breaking blades. Has the same features as #7 with the advantage of rear cut-off use.
Dimensions (see image) A: 3/4", B: 11/16"; C: 3/16"; D: 13/4"; Blade Height: 11/16"