1. Size: Handle Length: 16cm/6.3', Socket: 19mm/13mm, 122g 2. Material: 1045 steel. 1045 steel is a quality carbon mild steel, which has higher strength and deformation resistance. The socket wrench is made of 2mm thick 1045 steel, further enhancing its durability. 3. Allmetal twoinone design, functioning as both a socket wrench and screwdriver. The long handle provides powersaving efficiency. 4. Compatible with Sthil models: 010, 011, 012, 024, 026, 028, 029, 030, 031, 032, 034, 036, 038, 039, 041AV, 042, 044, 046, 048, 064, 066, 028AV, 032AV, AV 03, 4AV, 041AV, 042AV, 045AV, 017, 018, 020, 020T, 021, 023, MS240, MS260, MS270, MS280, MS290, MS310, MS390, MS340, MS360, MS360C, MS440, 460, MS640, MS650, MS660, 023L, 025, MS170, MS170C, MS180, MS200, MS200T, MS210, MS230, MS250, MS171, MS181, MS192T, MS211, MS231, MS251, MS251, MS251, MS22, 91, MS39911, MS361, MS362, MS391, MS441, MS461, MS270, MS271 Chainsaw, as well as Husqvarna 345, 435, 445 Chainsaw.