Wera Kraftform Kompakt 27 RA 1 Ratcheting Screwdriver Set, 6 Pieces, 05051517001

Wera Kraftform Kompakt 27 RA 1 Ratcheting Screwdriver Set, 6 Pieces, 05051517001

Wera Kraftform Kompakt 27 RA 1 (article number 05051517001) is a bit-holding screwdriver with an integrated ratchet, supplied with six BiTorsion bits stored in a magazine inside the handle itself. The drive is 1/4" hex.

A note about the name

The number 27 in "Kraftform Kompakt 27" designates Wera's product line, not the piece count. This particular article - RA 1 - contains 6 pieces: the ratcheting screwdriver plus five further bits in the magazine. The confusion is common, because the line name sits immediately before the quantity in many catalogues.

Ratchet in the handle

RA stands for Ratchet. The mechanism has fine toothing and is built into the handle rather than into a separate head. The practical difference shows in confined spaces: where there is no room to rotate your wrist fully, the driver returns without lifting the bit out of the screw. Fine toothing means a small engagement angle - which matters when the free travel is only a few degrees.

Bit magazine in the handle

The bits are stored in a magazine inside the handle. This is the defining feature of the Kompakt line and it solves a real problem: bits do not scatter through the bag and are always on the tool itself. Changing bits happens where you stand, with nothing else to reach for.

BiTorsion bits

The bits supplied are from the BiTorsion range. They have a torsion zone - a deliberately weakened section between tip and shank that twists elastically when torque spikes, absorbing the peak load instead of passing it to the tip. Those spikes are precisely what break ordinary bits and chew out screw recesses. The profiles supplied are:

• PH 1 and PH 2 (Phillips), 25 mm each
• PZ 1 and PZ 2 (Pozidriv), 25 mm each
• Slotted 5.5 x 1.0 mm and slotted 6.5 x 1.2 mm, 25 mm each

Kraftform handle

The handle is two-component, with alternating hard and soft zones. The layout is not decorative: hard zones let your hand slide during fast spinning without catching, while soft zones take the pressure during forceful tightening without raising blisters. The shape is asymmetric and determines how the hand sits - the main difference between Kraftform and an ordinary cylindrical handle.

Magnetic holder

The holder is a universal 1/4" hex with a stainless steel sleeve and a permanent magnet. The magnet retains the bit and, more usefully, holds the screw on the tip of the bit - which lets you start a screw one-handed in a place your other hand cannot reach.

Technical specifications

Questions and Answers