Characteristics:
- PROLINE standard and elongated hexagonal caps are offered in a wide range of sizes
 - The strength properties of the caps are higher than the requirements of DIN 3124 and PN-ISO 1711
 - Forged caps made of chrome-vanadium steel, subjected to a precise hardening and tempering process that guarantees proper hardness and strength
 - Chrome and polished
 - PROLINE sockets have specially profiled edges between the working planes - PRO-DRIVE system to eliminate excessive point loads and protect against excessive "excavations" of the edges of the screw head and the shell
 - Supplied in a cardboard box or on a pendant
 
Technical data:
- Product code: ZR18321
 - A (mm): 21
 - Square: 3/8"
 - L (mm): 28