Famag Adjustable Centre Spade Bit Size 2 22-76 mm - (Ref: 1540.002) Key Features: Version with centre point, one fixed main cutting edge and adjustable knife with taper tap. Adjustable center bit with a solid cylindrical shank 13 x 50 mm For drilling in soft wood, universal for all diameters and intermediate sizes Suitable for stationary use only. This tool is a compromise, for professional use we recommend our cylinder boring bits as e.g. our product line Bormax ® 2.0 UPM: 300 - 1500 rpm. e.g. for Ø 50 mm 600 rpm in soft wood, stationary use Specification: Outer diameter: 22-76 mm Overall length: 150 mm