Precision ground and machined in pairs, they measure 4" x 5" x 1" thick and have a through hole drilled to accept a 1/2" stud or bolt for clamping. These dimensions are the same as the typical stacking blocks used on the Storm Vulcan Block Master.
V-Block sets (lower left) are also available with Hinged C-clamps and tightening knobs (Part# BT1-V2). The C-clamps are rotated over the 2" Support Bar and tightened, to hold it securely in place during setup. Block thickness is increased to 2", with all other dimensions remaining the same.