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Rod End Tap-Drill Centring Guide
A three-station drill guide for putting a centred tap hole in the end of round stock. Slip the cut end of a 6 mm rod (M3, 2.5 mm drill) or an 8 mm rod (M4, 3.3 mm drill, or M5, 4.2 mm drill) into a 20 mm-deep socket, then drill through the coaxial 14 mm-long guide bore. You end up with steel or aluminium standoffs and axles tapped on-centre. The block is 64 x 24 x 34 mm, and dimples on top (1, 2 or 3 dots) mark each station.
Five-Size Hand Tap Guide Block
A bench jig that holds a hand tap perpendicular to the work while you start the thread, with five guide towers bored 3.4 / 4.5 / 5.5 / 6.6 / 8.6 mm for M3, M4, M5, M6 and M8 taps. Each bore is 30 mm long (a ~9:1 guide ratio on M3) with a 2 mm funnel counterbore at the top; the 116 x 40 x 5 mm base sits flat on the workpiece and has four 5.5 mm holes for M5 clamp screws, and 1-to-5 tally grooves along the front edge mark which tower is which.