Here's something many builders discover only after chewing up a screw head: the cross-recess screws in Japanese kits aren't Phillips. They're JIS — Japanese Industrial Standard — a subtly different profile that a Western Phillips driver never quite seats into. The Phillips tip rides up under torque, cams out, and rounds the head, which is why so many well-used Tamiya chassis carry mangled screws. Tamiya's Screwdriver Pro (M) is the fix: a JIS-profile driver, CNC-machined for exact engagement with the screws Tamiya actually puts in the box.

Made for the Screws in Your Kit

The Pro (M) #1 fits plus (+) head screws from M2 to M2.6 — the PH1-equivalent size that covers the overwhelming majority of fasteners in Tamiya RC kits, Mini 4WD machines and plastic model applications. Seated properly in a JIS recess, the machined tip transmits torque without cam-out, so screws go in firmly and come back out years later without drama — the difference you feel on the very first self-tapper into fresh plastic.

Precision Bit, Workshop-Grade Grip

The 4mm hardened bit is CNC-machined rather than stamped, giving the crisp, wobble-free fit that protects screw heads, and its 100mm length reaches down into chassis tubs and gearbox recesses. The two-material grip — rigid polypropylene core with an elastomer overlay, 26mm across — gives fine fingertip control for small screws and real palm torque when a self-tapper needs driving home.

Pick the Right Driver in the Family

This is the mid-size of Tamiya's Pro driver range: the Pro (M) #1 (this tool) for M2–M2.6 screws, the Pro (L) #2 (Item 74120) for the M3–M5 screws found in larger RC assemblies, and the short-bit Mini 4WD Screwdriver Pro (Item 74121) for compact working spaces. If you're only buying one for Tamiya kit building, it's this one — the M covers the sizes you'll meet most.